SUBSCRIPTION AND PURCHASE AGREEMENT

                                    for

        350 SHARES OF SERIES 5 CLASS E CONVERTIBLE PREFERRED STOCK,

                         PAR VALUE $.001 PER SHARE

                                    of

                  PERMA-FIX ENVIRONMENTAL SERVICES, INC.
                         (a Delaware corporation)























                               July 7, 1997


                             TABLE OF CONTENTS

                                                                       Page

1.   Subscription for Purchase of Series 5 Preferred Stock . . . . . . .  2
     1.1  Sale and Purchase. . . . . . . . . . . . . . . . . . . . . . .  2
     1.2  Reporting Company. . . . . . . . . . . . . . . . . . . . . . .  2
     1.3  Terms of the Series 5 Preferred Stock. . . . . . . . . . . . .  3

2.   Payment of Purchase Price; Delivery of Securities . . . . . . . . .  3
     2.1  Closing. . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
     2.2  Purchase Price and Payment . . . . . . . . . . . . . . . . . .  3
     2.3  Restrictive Legends. . . . . . . . . . . . . . . . . . . . . .  3

3.   Representations, Warranties and Covenants of Subscriber . . . . . .  3
     3.1  Investment Intent. . . . . . . . . . . . . . . . . . . . . . .  4
     3.2  Certain Risk . . . . . . . . . . . . . . . . . . . . . . . . .  4
     3.3  Prior Investment Experience. . . . . . . . . . . . . . . . . .  5
     3.4  No Review by the SEC . . . . . . . . . . . . . . . . . . . . .  5
     3.5  Not Registered . . . . . . . . . . . . . . . . . . . . . . . .  5
     3.6  No Public Market . . . . . . . . . . . . . . . . . . . . . . .  5
     3.7  Sophisticated Investor . . . . . . . . . . . . . . . . . . . .  6
     3.8  SEC Filing . . . . . . . . . . . . . . . . . . . . . . . . . .  6
     3.9  Documents, Information and Access. . . . . . . . . . . . . . .  6
     3.10 No Registration, Review or Approval. . . . . . . . . . . . . .  7
     3.11 Transfer Restrictions. . . . . . . . . . . . . . . . . . . . .  7
     3.12 Trading Activity . . . . . . . . . . . . . . . . . . . . . . .  7
     3.13 Reliance . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
     3.14 Accuracy or Representations and Warranties . . . . . . . . . .  8
     3.15 Indemnity. . . . . . . . . . . . . . . . . . . . . . . . . . .  8
     3.16 Survival . . . . . . . . . . . . . . . . . . . . . . . . . . .  8

4.   Representations, Warranties and Covenants of the
     Company . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9
     4.1  Organization, Authority, Qualification . . . . . . . . . . . .  9
     4.2  Authorization. . . . . . . . . . . . . . . . . . . . . . . . .  9
     4.3  Ownership of, and Title to, Securities . . . . . . . . . . . .  9
     4.4  Exemption from Registration. . . . . . . . . . . . . . . . . .  9
     4.5  Use of Proceeds from this Offering . . . . . . . . . . . . . .  9

5.   Registration Rights . . . . . . . . . . . . . . . . . . . . . . . . 10
     5.1  Registration . . . . . . . . . . . . . . . . . . . . . . . . . 10
     5.2  Current Registration Statement . . . . . . . . . . . . . . . . 10
     5.3  Other Provisions . . . . . . . . . . . . . . . . . . . . . . . 11
     5.4  Costs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
     5.5  Successors . . . . . . . . . . . . . . . . . . . . . . . . . . 11


6.   Indemnification.. . . . . . . . . . . . . . . . . . . . . . . . . . 11
     6.1  By the Company . . . . . . . . . . . . . . . . . . . . . . . . 11
     6.2  By the Subscriber. . . . . . . . . . . . . . . . . . . . . . . 12
     6.3  Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.   Securities Legends and Notices. . . . . . . . . . . . . . . . . . . 13

8.   Miscellaneous.  . . . . . . . . . . . . . . . . . . . . . . . . . . 14
     8.1  Amendment; Waiver. . . . . . . . . . . . . . . . . . . . . . . 14
     8.2  Binding Effect; Assignment . . . . . . . . . . . . . . . . . . 14
     8.3  Governing Law; Litigation Costs. . . . . . . . . . . . . . . . 14
     8.4  Severability . . . . . . . . . . . . . . . . . . . . . . . . . 15
     8.5  Headings . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
     8.6  Counterparts . . . . . . . . . . . . . . . . . . . . . . . . . 15
     8.7  Transfer Taxes . . . . . . . . . . . . . . . . . . . . . . . . 15
     8.8  Entire Agreement . . . . . . . . . . . . . . . . . . . . . . . 15
     8.9  Authority; Enforceability. . . . . . . . . . . . . . . . . . . 15
     8.10 Notices. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
     8.11 No Third Party Beneficiaries . . . . . . . . . . . . . . . . . 16
     8.12 Public Announcements . . . . . . . . . . . . . . . . . . . . . 16

Exhibit "A"    -    Certificate of Designations









                              -ii-


                    SUBSCRIPTION AND PURCHASE AGREEMENT

                                    for

        350 SHARES OF SERIES 5 CLASS E CONVERTIBLE PREFERRED STOCK,

                         PAR VALUE $.001 PER SHARE

                                    of

                  PERMA-FIX ENVIRONMENTAL SERVICES, INC.
                         (a Delaware corporation)


     THIS SUBSCRIPTION AND PURCHASE AGREEMENT (the "Agreement") is
dated as of the 3rd day of July, 1997, by and between PERMA-FIX
ENVIRONMENTAL SERVICES, INC., a Delaware corporation, having offices
at 1940 Northwest 67th Place, Gainesville, Florida 32653 (the
"Company"), and THE INFINITY FUND, L.P., a Georgia limited
partnership, and having its principal offices at 3 Piedmont Center,
Suite 210, Atlanta, Georgia 30305 (the "Subscriber").

                           W I T N E S S E T H:

     WHEREAS, the Subscriber and the Company have arranged for the
Agreement to provide for the subscription and, if such subscription
as set forth in this Agreement is accepted by the Company, the
purchase by the Subscriber, on the terms and subject to the
conditions set forth in this Agreement, of an aggregate of 350
shares of a new series of convertible preferred stock, par value
$.001 per share, to be designated by the Company's Board of
Directors as "Series 5 Class E Convertible Preferred Stock" (the
"Series 5 Preferred Stock"), with such Series 5 Preferred Stock
containing such terms, conditions, restrictions and provisions as
set forth in the Certificate of Designations attached hereto as
Exhibit "A;"

     WHEREAS, the Company's Common Stock is listed for trading on
the Boston Stock Exchange and the National Association of Securities
Dealers Automated Quotation system ("NASDAQ"), and the Company is
subject to the reporting requirements of Section 13 or 15(d) of the
Securities Exchange Act of 1934, as amended (the "Exchange Act") and
has been subject to such filing requirements for the past ninety
(90) days;

     WHEREAS, the Subscriber is an "accredited investor" as such
term is defined in Rule 501 of Regulation D promulgated under the
Securities Act of 1933, as amended (the "Securities Act");

     WHEREAS, the principal place of business of the Subscriber is
located in Atlanta, Georgia;


     WHEREAS, in order to induce the Subscriber to enter into this
Agreement and to subscribe for and purchase the Securities on the
terms and subject to the conditions hereof, the Company is granting
certain registration rights under the Agreement with respect to the
Common Stock issuable upon the conversion of the Series 5 Preferred
Stock;

     WHEREAS, in reliance upon the representations made by the
Subscriber in this Agreement, the transactions contemplated by this
Agreement are such that  the offer and sale of the Series 5
Preferred Stock by the Company hereunder will be exempt from
registration under applicable federal and state (U. S.) securities
laws since this is a private placement and intended to be a
nonpublic offering pursuant to Sections 4(2) and/or 3(b) of the
Securities Act and/or Regulation D promulgated under the Securities
Act; and,

     WHEREAS, the Series 5 Preferred Stock to be sold in accordance
with this Agreement will not be quoted or listed for trading on any
securities exchange, organized market or quotation system at the
time of acquisition hereunder.

     NOW, THEREFORE, for and in consideration of the premises, and
the mutual representations, warranties, covenants and agreements set
forth herein, and for other good and valuable consideration, receipt
of which is hereby acknowledged, the parties hereto agree as
follows:

1.   Subscription for Purchase of Series 5 Preferred Stock.

     1.1  Sale and Purchase.  On the basis of the representations,
          warranties, covenants and agreements, and subject to the
          terms and conditions set forth herein, on the Closing
          Date, the Company agrees to sell, transfer, convey and
          deliver to the Subscriber, and the Subscriber agrees to
          purchase, acquire and accept delivery from the Company,
          three hundred fifty (350) shares of the Series 5
          Preferred Stock for an aggregate purchase price of Three
          Hundred Fifty Thousand Dollars ($350,000) ("Purchase
          Price").

     1.2  Reporting Company.  Although the Series 5 Preferred Stock
          and the shares of Common Stock issuable upon conversion
          of the Series 5 Preferred Stock (the "Conversion Shares")
          shall not be registered as of the Closing under federal
          or state securities laws or any rules or regulations
          promulgated thereunder, the Company is a reporting
          company under the Securities Exchange Act of 1934, as
          amended (the "Exchange Act"), and has filed with the
          Securities and Exchange Commission (the "SEC") all
          reports required to be filed by the Company under Section
          13 or 15(d) of the Exchange Act.  The Subscriber has had
          the opportunity to review, and has reviewed, all such
          reports and information which the Subscriber deemed
          material to an investment decision regarding the purchase
          of the Securities.


                              -2-


     1.3  Terms of the Series 5 Preferred Stock.  The Series 5
          Preferred Stock shall contain and be subject to the
          terms, conditions, preferences and restrictions set forth
          in the Certificate of Designations attached hereto as
          Exhibit "A" ("Certificate of Designations").

2.   Payment of Purchase Price; Delivery of Securities.

     2.1  Closing.  The consummation of this Agreement (the
          "Closing") will occur on July 3, 1997 (the "Closing
          Date"), at the offices of the Company or at such other
          mutually convenient time or at such other mutually
          convenient place as agreed upon by the parties.

     2.2  Purchase Price and Payment.  At the Closing, the
          Subscriber shall deliver to the Company the Purchase
          Price, in cash by wire transfer.  Upon receipt by the
          Company of the Purchase Price, the Company shall cause to
          be delivered: (a) to the Subscriber, c/o Bear Stearns &
          Co., 55 Water Street, Third Floor, Concourse Level, South
          Building, New York, New York 10040-0082, a certificate or
          certificates representing the 350 shares of Series 5
          Preferred Stock purchased by the Subscriber, in such
          denominations as Subscriber requests in writing, and (b)
          to the Subscriber, written evidence from the Secretary of
          State of the State of Delaware that the Certificate of
          Designations has been filed in the Office of the
          Secretary of State of the State of Delaware on or before
          the Closing Date.

     2.3  Restrictive Legends.  Subscriber agrees that, subject to
          the provisions of Section 5 below, all certificates
          representing the Series 5 Preferred Stock shall bear the
          restrictive legend substantially in the form set forth in
          Section 7 below which shall include, but not be limited
          to, a legend to the effect that (a) the Series 5
          Preferred Stock represented by such certificate has not
          been registered under the Securities Act, and (b) unless
          there is an effective registration statement relating to
          the Series 5 Preferred Stock and the Conversion Shares,
          neither the Series 5 Preferred Stock nor the Conversion
          Shares may be offered, sold, transferred, mortgaged,
          pledged or hypothecated without an exemption from
          registration and an opinion of counsel to the Company
          with respect thereto, or an opinion from counsel for the
          Subscriber, which opinion is satisfactory to the Company,
          to the effect that registration under the Act is not
          required in connection with such sale or transfer and the
          reasons therefor.  The legend on all such certificates
          shall make reference to the registration rights set forth
          in Section 5 hereof.
     
3.   Representations, Warranties and Covenants of Subscriber.  The
Subscriber hereby represents, warrants and covenants to the Company
as follows:


                               -3-

     3.1  Investment Intent.  The Subscriber represents and
          warrants that the Series 5 Preferred Stock is being, and
          any underlying Conversion Shares will be,  purchased or
          acquired solely for the Subscriber's own account, for
          investment purposes only and not with a view toward the
          distribution or resale to others.  The Subscriber
          acknowledges, understands and appreciates that the Series
          5 Preferred Stock has not been registered under the
          Securities Act by reason of a claimed exemption under the
          provisions of the Securities Act which depends, in large
          part, upon the Subscriber's representations as to
          investment invention, investor status, and related and
          other matters set forth herein.  Subscriber understands
          that, in the view of the United States Securities and
          Exchange Commission (the "SEC"), among other things, a
          purchase now with an intent to distribute or resell would
          represent a purchase and acquisition with an intent
          inconsistent with its representation to the Company, and
          the SEC might regard such a transfer as a deferred sale
          for which the registration exemption is not available.

     3.2  Certain Risk.  The Subscriber recognizes that the
          purchase of the Series 5 Preferred Stock involves a high
          degree of risk in that (a) the Company has sustained
          losses through March 31, 1997, from its operations, and
          may require substantial funds in addition to the proceeds
          of this private placement; (b) that the Company has a
          substantial accumulated deficit; (c) an investment in the
          Company is highly speculative and only investors who can
          afford the loss of their entire investment should
          consider investing in the Company and the Series 5
          Preferred Stock; (d) an investor may not be able to
          liquidate his investment; (e) transferability of the
          Series 5 Preferred Stock is extremely limited; (f) in the
          event of a disposition an investor could sustain the loss
          of his entire investment; (g) the Series 5 Preferred
          Stock represents non-voting equity securities, and the
          right to convert into and purchase shares of voting
          equity securities in a corporate entity that has an
          accumulated deficit; (h) no return on investment, whether
          through distributions, appreciation, transferability or
          otherwise, and no performance by, through or of the
          Company, has been promised, assured, represented or
          warranted by the Company, or by any director, officer,
          employee, agent or representative thereof; and, (i) while
          the Common Stock is presently quoted and traded on the
          Boston Stock Exchange and the Nasdaq SmallCap Market and
          while the Subscriber is a beneficiary of certain
          registration rights provided herein, the Series 5
          Preferred Stock subscribed for and that is purchased
          under this Agreement  and the Conversion Shares (i) are
          not registered under applicable federal or state
          securities laws, and thus may not be sold, conveyed,
          assigned or transferred unless registered under such laws
          or unless an exemption from registration is available
          under such laws, as more fully described herein, and (ii)
          the Series 5 Preferred Stock subscribed for and that is
          to be purchased under this Agreement is not quoted,

                                -4-

          traded or listed for trading or quotation on the NASDAQ,
          or any other organized market or quotation system, and
          there is therefore no present public or other market for
          the Series 5 Preferred Stock, nor can there be any
          assurance that the Common Stock of the Company will
          continue to be quoted, traded or listed for trading or
          quotation on the Boston Stock Exchange or the Nasdaq
          SmallCap Market or on any other organized market or
          quotation system.

     3.3  Prior Investment Experience.  The Subscriber acknowledges
          that it has prior investment experience, including
          investment in non-listed and non-registered securities,
          or has employed the services of an investment advisor,
          attorney or accountant to read all of the documents
          furnished or made available by the Company to it and to
          evaluate the merits and risks of such an investment on
          its behalf, and that it recognizes the highly speculative
          nature of this investment.

     3.4  No Review by the SEC.  The Subscriber hereby acknowledges
          that this offering of the Series 5 Preferred Stock has
          not been reviewed by the SEC because this private
          placement is intended to be a nonpublic offering pursuant
          to Sections 4(2) and/or 3(b) of the Securities Act and/or
          Regulation D promulgated under the Securities Act.

     3.5  Not Registered.  The Subscriber understands that the
          Series 5 Preferred Stock and the Conversion Shares have
          not been registered under the Securities Act by reason of
          a claimed exemption under the provisions of the
          Securities Act which depends, in part, upon the
          Subscriber's investment intention.  In this connection,
          the Subscriber understands that it is the position of the
          SEC that the statutory basis for such exemption would not
          be present if its representation merely meant that its
          present intention was to hold such securities for a short
          period, such as the capital gains period of tax statutes,
          for a deferred sale, for a market rise (assuming that a
          market develops), or for any other fixed period.

     3.6  No Public Market.  The Subscriber understands that there
          is no public market for the Series 5 Preferred Stock. 
          The Subscriber understands that although there is
          presently a public market for the Common Stock, including
          the Common Stock issuable upon conversion of the Series
          5 Preferred Stock, Rule 144 (the "Rule") promulgated
          under the Securities Act requires, among other
          conditions, a one-year holding period following full
          payment of the consideration therefor prior to the resale
          (in limited amounts) of securities acquired in a
          nonpublic offering without having to satisfy the
          registration requirements under the Securities Act.  The
          Subscriber understands that the Company makes no
          representation or warranty regarding its fulfillment in
          the future of any reporting requirements under the
          Exchange Act, or its dissemination to the public of any
          current financial or other information concerning the
          Company, as is required by the Rule as one of the
          conditions of its availability.  The Subscriber

                              -5-

          understands and hereby acknowledges that the Company is
          under no obligation to register the Series 5 Preferred
          Stock or the Conversion Shares under the Securities Act,
          except as set forth in Section 5 hereof.  The Subscriber
          agrees to hold the Company and its directors, officers
          and controlling persons and their respective heirs,
          representatives, successors and assigns harmless and to
          indemnify them against all liabilities, costs and
          expenses incurred by them as a result of any
          misrepresentation made by the Subscriber contained herein
          or any sale or distribution by the Subscriber in
          violation of the Securities Act or any applicable state
          securities or "blue sky" laws (collectively, "Securities
          Laws").

     3.7  Sophisticated Investor.  That (a) the Subscriber is an
          "accredited investor," as such term is defined in Rule
          501 of Regulation D promulgated under the Securities Act,
          and has total assets in excess of $5,000,000; (b) the
          Subscriber has adequate means of providing for the
          Subscriber's current financial needs and possible
          contingencies and has no need for liquidity of the
          Subscriber's investment in the Series 5 Preferred Stock;
          (c) the Subscriber is able to bear the economic risks
          inherent in an investment in the Series 5 Preferred Stock
          and that an important consideration bearing on its
          ability to bear the economic risk of the purchase of
          Series 5 Preferred Stock is whether the Subscriber can
          afford a complete loss of the Subscriber's investment in
          the Series 5 Preferred Stock and the Subscriber
          represents and warrants that the Subscriber can afford
          such a complete loss; and (d) the Subscriber has such
          knowledge and experience in business, financial,
          investment and banking matters (including, but not
          limited to, investments in restricted, non-listed and
          non-registered securities) that the Subscriber is capable
          of evaluating the merits, risks and advisability of an
          investment in the Series 5 Preferred Stock.

     3.8  SEC Filing.  The Subscriber acknowledges that it has been
          previously furnished with true and complete copies of the
          following documents which have been filed with the SEC
          pursuant to Sections 13(a), 14(a), 14(c) or 15(d) of the
          Exchange Act since January 1, 1997, and that such have
          been furnished to the Subscriber a reasonable time prior
          to the date hereof: (a) the Company's Form 10-K for the
          year ended December 31, 1996; (b) the Company's Form 10-Q
          for the quarter ended March 31, 1997, and (c) the
          Company's Form 8-K, date of event reported: June 11,
          1997, as amended by the Company's Form 8-K/A, dated
          June 25, 1997.

     3.9  Documents, Information and Access.  The Subscriber's
          decision to purchase the Series 5 Preferred Stock is not
          based on any promotional, marketing or sales materials,
          and the Subscriber and its representatives have been
          afforded, prior to purchase thereof, the opportunity to
          ask questions of, and to receive answers from, the
          Company and its management, and has had access to all

                              -6-

          documents and information which Subscriber deems material
          to an investment decision with respect to the purchase of
          Series 5 Preferred Stock hereunder.

     3.10 No Registration, Review or Approval.  The Subscriber
          acknowledges and understands that the private offering
          and sale of Series 5 Preferred Stock pursuant to this
          Agreement has not been reviewed or approved by the SEC or
          by any state securities commission, authority or agency,
          and is not registered under the Securities Laws.  The
          Subscriber acknowledges, understands and agrees that the
          Series 5 Preferred Stock is being offered and sold
          hereunder pursuant to (i) a private placement exemption
          to the registration provisions of the Securities Act
          pursuant to Section 3(b) and/or Section 4(2) of such
          Securities Act and/or Regulation D promulgated under the
          Securities Act) and (ii) a similar exemption to the
          registration provisions of applicable state securities
          laws.

     3.11 Transfer Restrictions.  That Subscriber will not transfer
          any Series 5 Preferred Stock purchased under this
          Agreement or any Conversion Shares acquired upon
          conversion of the Series 5 Preferred Stock unless such
          Series 5 Preferred Stock or the Conversion Shares,
          whichever is applicable, is registered under the
          Securities Laws, or unless an exemption is available
          under such Securities Laws, and the Company may, if it
          chooses, where an exemption from registration is claimed
          by such Subscriber, condition any transfer of Series 5
          Preferred Stock or Conversion Shares out of the
          Subscriber's name on an opinion of the Company's counsel,
          to the effect that the proposed transfer is being
          effected in accordance with, and does not violate, an
          applicable exemption from registration under the
          Securities Laws, or an opinion of counsel to the
          Subscriber, which opinion is satisfactory to the Company,
          to the effect that registration under the Securities Act
          is not required in connection with such sale or transfer
          and the reasons therefor.

     3.12 Trading Activity.  The Subscriber expressly agrees that
          until such time that it has sold all of the Series 5
          Preferred Stock and/or all of the Conversion Shares that
          it shall not, directly or indirectly, through an
          affiliate (as that term is defined under Rule 405
          promulgated under the Securities Act) or by, with or
          through an unrelated third party or entity, whether or
          not pursuant to a written or oral understanding,
          agreement, arrangement, scheme, or artifice of nature
          whatsoever, engage in the short selling of the Company's

                              -7-

          Common Stock or any other equity securities of the
          Company, whether now existing or hereafter issued, or
          engage in any other activity of any nature whatsoever
          that has the same effect as a short sale, or is a de
          facto or de jure short sale, of the Company's Common
          Stock or any other equity security of the Company,
          whether now existing or hereafter issued, including, but
          not limited to, the sale of any rights pursuant to any
          understanding, agreement, arrangement, scheme or artifice
          of any nature whatsoever, whether oral or in writing,
          relative to the Company's Common Stock or any other
          equity securities of the Company whether now existing or
          hereafter created.  The Subscriber agrees that it will
          not engage, and will cause its affiliates not to engage,
          in any activity designed to reduce the price of the
          Company's Common Stock, as quoted on the Boston Stock
          Exchange or the NASDAQ, in connection with the
          Subscriber's conversion of any of the Series 5 Preferred
          Stock.  The Subscriber agrees to refrain, and cause its
          affiliates to refrain, from engaging in, or inducing
          others to engage in, any activity relating to the Company
          or Common Stock of the Company that is proscribed under
          Regulation M promulgated under the Exchange Act.

     3.13 Reliance.  The Subscriber understands and acknowledges
          that the Company is relying upon all of the
          representations, warranties, covenants, understandings,
          acknowledgements and agreements contained in this
          Agreement in determining whether to accept this
          subscription and to sell and issue the Series 5 Preferred
          Stock to the Subscriber.

     3.14 Accuracy or Representations and Warranties.  All of the
          representations, warranties, understandings and
          acknowledgments that Subscriber has made herein are true
          and correct in all material respects as of the date of
          execution hereof.  The Subscriber will perform and comply
          fully in all material respects with all covenants and
          agreements set forth herein, and the Subscriber covenants
          and agrees that until the acceptance of this Agreement by
          the Company, the Subscriber shall inform the Company
          immediately in writing of any changes in any of the
          representations or warranties provided or contained
          herein.

     3.15 Indemnity.  The Subscriber hereby agrees to indemnify and
          hold harmless the Company, and the Company's successors
          and assigns, from, against and in all respects of any
          demands, claims, actions or causes of action,
          assessments, liabilities, losses, costs, damages,
          penalties, charges, fines or expenses (including, without
          limitation, interest, penalties, and attorney and
          accountants' fees, disbursements and expenses), arising
          out of or relating to any breach by Subscriber of any
          representations, warranty, covenant or agreement made by
          Subscriber in this Agreement.  Such right to
          indemnification shall be in addition to any and all other
          rights of the Company under this Agreement or otherwise,
          at law or in equity.

     3.16 Survival.  The Subscriber expressly acknowledges and
          agrees that all of its representations, warranties,
          agreements and covenants set forth in this Agreement
          shall be of the essence hereof and shall survive the
          execution, delivery and Closing of this Agreement, the
          sale and purchase of the Series 5 Preferred Stock, the
          conversion of the Series 5 Preferred Stock, and the sale
          of the Conversion Shares.


                                -8-

4.   Representations, Warranties and Covenants of the Company.  In
order to induce Subscriber to enter into this Agreement and to
purchase the Series 5 Preferred Stock, the Company hereby
represents, warrants and covenants to Subscriber as follows:

     4.1  Organization, Authority, Qualification.  The Company is
          a corporation duly incorporated, validly existing and in
          good standing under the laws of the State of Delaware. 
          The Company has full corporate power and authority to own
          and operate its properties and assets and to conduct and
          carry on its business as it is now being conducted and
          operated.

     4.2  Authorization.  The Company has full power and authority
          to execute and deliver this Agreement and to perform its
          obligations under and consummate the transactions
          contemplated by this Agreement.  Upon the execution of
          this Agreement by the Company and delivery of the Series
          5 Preferred Stock, this Agreement shall have been duly
          and validly executed and delivered by the Company and
          shall constitute the legal, valid and binding obligation
          of the Company, enforceable against the Company in
          accordance with its terms.

     4.3  Ownership of, and Title to, Securities.  The Series 5
          Preferred Stock to be purchased by the Subscriber is, and
          all Conversion Shares, when issued, will be, duly
          authorized, validly issued, fully paid and nonassessable
          shares of the capital stock of the Company, free of
          personal liability.  Upon consummation of the purchase of
          the Series 5 Preferred Stock (and upon the conversion of
          the Series 5 Preferred Stock, in whole or in part)
          pursuant to this Agreement, the Subscriber will own and
          acquire title to the Series 5 Preferred Stock (and the
          Conversion Shares) free and clear of any and all proxies,
          voting trusts, pledges, options, restrictions, or other
          legal or equitable encumbrance of any nature whatsoever
          (other than the restrictions on transfer due to
          Securities Laws or as otherwise provided for in this
          Agreement or the Certificate of Designation).

     4.4  Exemption from Registration.  The offer and sale of
          Series 5 Preferred Stock to the Subscriber in accordance
          with the terms and provisions of this Agreement is being
          effected in accordance with the Securities Act, pursuant
          to a private placement exemption to the registration
          provisions of the Act pursuant to Section 3(b) and/or
          4(2) of such Act and/or Regulation D promulgated under
          such Act, based on the representations, warranties and
          covenants made by the Subscriber contained in this
          Agreement.

     4.5  Use of Proceeds from this Offering.  The net proceeds
          from the sale of the Series 5 Preferred Stock are
          estimated to be approximately $345,000 after payment of
          legal fees and expenses of approximately $5,000, but
          prior to any fees and expenses relating to the
          registration of the Conversion Shares pursuant to the


                              -9-

          terms of Section 5 hereof.  The Company intends to
          utilize the net proceeds to reduce outstanding debt and
          for general working capital.

5.   Registration Rights.  In order to induce the Subscriber to
enter into this Agreement and purchase the Series 5 Preferred Stock,
the Company hereby covenants and agrees to grant to the Subscriber
the rights set forth in this Section 5 with respect to the
registration of the Conversion Shares.

     5.1  Registration.  Subject to the terms of Section 5 hereof,
          the Company agrees that within thirty (30) days after the
          Closing Date, it shall prepare and file with the SEC, a
          registration statement on Form S-3 or equivalent form
          (the "Registration Statement") and such other documents,
          including a prospectus, as may be necessary in the
          opinion of counsel for the Company in order to comply
          with the provisions of the Securities Act, so as to
          permit a public offering and sale by the Subscriber of up
          to 200,000 shares of Common Stock issuable upon
          conversion of the Series 5 Preferred Stock, plus up to
          36,000 shares of Common Stock, if any, issuable as
          payment of dividends on the Series 5 Preferred Stock
          pursuant to the terms of the Series 5 Preferred Stock. 
          The Company shall use its reasonable efforts to cause
          such Registration Statement to become effective at the
          earliest possible date after filing.  In connection with
          the offering of such Common Stock registered pursuant to
          this Section 5, the Company shall take such reasonable
          actions, as it deems necessary, to qualify the Common
          Stock issuable upon conversion of the Series 5 Preferred
          Stock, plus the Common Stock issuable as payment of
          dividends on the Series 5 Preferred Stock, covered by
          such Registration Statement under such "blue sky" or
          other state securities laws for offer and sale as shall
          be reasonably necessary to permit the public offering and
          sale of such shares of Common Stock covered by such
          Registration Statement; provided, however, that the
          Company shall not be required (a) to qualify generally to
          do business in any jurisdiction where it would not
          otherwise be required to qualify but for this
          subparagraph, (b) to subject itself to taxation in any
          such jurisdiction, or (c) to consent to general service
          of process in any such jurisdiction.  It is expressly
          agreed that in no event are any registration rights being
          granted to the Series 5 Preferred Stock itself, but only
          with respect to up to 200,000 shares of the underlying
          Conversion Shares issuable upon exercise of the Series 5
          Preferred Stock, plus up to 36,000 shares of Common Stock
          that the Company may issue in payment of dividends on the
          Series 5 Preferred Stock.

     5.2  Current Registration Statement.  Once effective, the
          Company shall use its reasonable efforts to cause such
          Registration Statement filed hereunder to remain current
          and effective for a period of two (2) years or until the
          Conversion Shares covered by such Registration Statement
          are sold by the Subscriber, whichever is sooner.  The

                              -10-

          Subscriber shall promptly provide all such information
          and materials and take all such action as may be required
          in order to permit the Company to comply with all
          applicable requirements of the SEC and to obtain any
          desired acceleration of the effective date of such
          registration statement.

     5.3  Other Provisions.  In connection with the offering of any
          Conversion Shares registered pursuant to this Section 5,
          the Company shall furnish to the Subscriber such number
          of copies of any final prospectus as it may reasonably
          request in order to effect the offering and sale of the
          Conversion Shares to be offered and sold under such
          Registration Statement.  In connection with any offering
          of Conversion Shares registered pursuant to this Section
          5, the Company shall (a) furnish to the underwriters (if
          any), at the Company's expense, unlegended certificates
          representing ownership of the Conversion Shares sold
          under such Registration Statement in such denominations
          as requested and (b) instruct any transfer agent and
          registrar of the Conversion Shares sold under such
          Registration Statement to release immediately any stop
          transfer order, and to remove any restrictive legend,
          with respect to such Conversion Shares included in any
          registration becoming effective pursuant to this
          Agreement upon the sale of such shares by the Subscriber.

     5.4  Costs.  Subject to the immediately following sentence,
          the Company shall in all events pay and be responsible
          for all fees, expenses, costs and disbursements
          associated with the Registration Statement relating to
          the Conversion Shares under this Section 5, including
          filing fees, fees, costs and disbursements of any
          counsel, accountants and other consultants representing
          the Company in connection therewith.  Notwithstanding
          anything set forth herein to the contrary, Subscriber
          shall be responsible for and pay any and all underwriting
          discounts and commissions in connection with the sale of
          the Conversion Shares pursuant hereto or the Registration
          Statement and all fees of its legal counsel and other
          advisors retained in connection with reviewing such
          Registration Statement.

     5.5  Successors.  The Company will require any successor
          (whether direct or indirect, by purchase, merger,
          consolidation or otherwise) to all or substantially all
          of the business, properties, stock or assets of the
          Company, to expressly assume and agree to perform this
          Agreement in the same manner and to the same extent that
          the Company would be required to perform it if no such
          succession had taken place.

6.   Indemnification.

     6.1  By the Company.  Subject to the terms of this Section 6,
          the Company will indemnify and hold harmless the
          Subscriber, its directors and officers, and any
          underwriter (as defined in the Securities Act) for the


                             -11-

          Subscriber and each person, if any, who controls the
          Subscriber or such underwriter within the meaning of the
          Act, from and against, and will reimburse the Subscriber
          and each such underwriter and controlling person with
          respect to, any and all loss, damage, liability, cost and
          expense to which such holder or any such underwriter or
          controlling person may become subject under the Act or
          otherwise, insofar as such losses, damages, liabilities,
          costs or expenses are caused by any untrue statement or
          alleged untrue statement of any material fact contained
          in the Registration Statement filed with the SEC pursuant
          to Section 5, any prospectus contained therein or any
          amendment or supplement thereto, or arise out of, or are
          based upon, the omission or alleged omission to state
          therein a material fact required to be stated therein or
          necessary to make the statements therein, in light of the
          circumstances in which they were made not misleading;
          provided, however, that the Company will not be liable in
          any such case to the extent that any such loss, damage,
          liability, cost or expense arises out of, or is based
          upon, an untrue statement or alleged untrue statement or
          omission or alleged omission so made in conformity with
          information furnished by the Subscriber, such underwriter
          or such controlling person in writing specifically for
          use in the preparation thereof.

     6.2  By the Subscriber.  Subject to the terms of this Section
          6, the Subscriber will indemnify and hold harmless the
          Company, its directors and officers, any controlling
          person and any underwriter from and against, and will
          reimburse the Company, its directors and officers, any
          controlling person and any underwriter with respect to,
          any and all loss, damage, liability, cost or expense to
          which the Company or any controlling person and/or any
          underwriter may become subject under the Securities Act
          or otherwise, insofar as such losses, damages,
          liabilities, costs or expenses are caused by any untrue
          statement or alleged untrue statement of any material
          fact contained in such Registration Statement filed with
          the SEC pursuant to Section 5, any prospectus contained
          therein or any amendment or supplement thereto, or arise
          out of, or are based upon, the omission or alleged
          omission to state therein a material fact required to be
          stated therein or necessary to make the statements
          therein, in light of the circumstances in which they were
          made, not misleading, in each case to the extent, but
          only to the extent, that such untrue statement or alleged
          untrue statement or omission or alleged omission was so
          made in reliance upon, and in strict conformity with,
          written information furnished by, or on behalf of, the
          Subscriber specifically for use in the preparation
          thereof.

     6.3  Procedure.  Promptly after receipt by an indemnified
          party pursuant to the provisions of Section 6.1 or 6.2 of
          notice of the commencement of any action involving the
          subject matter of the foregoing indemnity provisions,
          such indemnified party will, if a claim thereof is to be
          made against the indemnifying party pursuant to the
          provisions of Section 6.1 or 6.2, promptly notify the


                              -12-

          indemnifying party of the commencement thereof; but the
          omission to so notify the indemnifying party will not
          relieve the indemnifying party from any liability which
          it may have to any indemnified party otherwise than
          hereunder.  In case such action is brought against any
          indemnified party and the indemnified party notifies the
          indemnifying party of the commencement thereof, the
          indemnifying party shall have the right to participate
          in, and, to the extent that it may wish, assume the
          defense thereof; or, if there is a conflict of interest
          which would prevent counsel for the indemnifying party
          from also representing the indemnified party, the
          indemnified parties have the right to select only one (1)
          separate counsel to participate in the defense of such
          action on behalf of all such indemnified parties.  After
          notice from the indemnifying parties to such indemnified
          party of the indemnifying parties' election so to assume
          the defense thereof, the indemnifying parties will not be
          liable to such indemnified parties pursuant to the
          provisions of said Section 6.1 or 6.2 for any legal or
          other expense subsequently incurred by such indemnified
          parties in connection with the defense thereof, other
          than reasonable costs of investigation, unless (a) the
          indemnified parties shall have employed counsel in
          accordance with the provisions of the preceding sentence;
          (b) the indemnifying parties shall not have employed
          counsel satisfactory to the indemnified parties to
          represent the indemnified parties within a reasonable
          time after the notice of the commencement of the action
          or (c) the indemnifying party has authorized the
          employment of counsel for the indemnified party at the
          expense of the indemnifying parties.

7.   Securities Legends and Notices.  Subscriber represents and
warrants that it has read, considered and understood the following
legends, and agrees that such legends, substantially in the form and
substance set forth below, shall be placed on all of the
certificates representing the Series 5 Preferred Stock:

     Series 5 Preferred Stock Legends

     NEITHER THIS PREFERRED STOCK NOR ANY SHARES OF COMMON
     STOCK ISSUABLE UPON THE CONVERSION OF THIS PREFERRED
     STOCK HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF
     1933, AS AMENDED (THE "SECURITIES ACT") OR QUALIFIED
     UNDER APPLICABLE STATE SECURITIES LAWS.  THIS PREFERRED
     STOCK AND THE COMMON STOCK ISSUABLE UPON CONVERSION OF
     THIS PREFERRED STOCK MAY NOT BE OFFERED, SOLD, PLEDGED,
     HYPOTHECATED OR OTHERWISE TRANSFERRED IN THE ABSENCE OF
     AN EFFECTIVE REGISTRATION STATEMENT AND QUALIFICATION IN
     EFFECT WITH RESPECT THERETO UNDER THE SECURITIES ACT AND
     UNDER ANY APPLICABLE STATE SECURITIES LAW OR WITHOUT THE
     PRIOR WRITTEN CONSENT OF PERMA-FIX ENVIRONMENTAL


                            -13-

     SERVICES, INC. AND AN OPINION OF PERMA-FIX ENVIRONMENTAL
     SERVICES, INC.'S COUNSEL, OR AN OPINION FROM COUNSEL FOR
     THE HOLDER HEREOF, WHICH OPINION IS SATISFACTORY TO THE
     COMPANY, THAT SUCH REGISTRATION AND QUALIFICATION IS NOT
     REQUIRED UNDER APPLICABLE FEDERAL AND STATE SECURITIES
     LAWS OR AN EXEMPTION THEREFROM.

     NOTWITHSTANDING THE FOREGOING, THE SHARES OF COMMON STOCK
     ISSUABLE UPON CONVERSION OF THIS PREFERRED STOCK ARE ALSO
     SUBJECT TO THE REGISTRATION RIGHTS SET FORTH IN THAT
     CERTAIN SUBSCRIPTION AND PURCHASE AGREEMENT BY AND
     BETWEEN THE HOLDER HEREOF AND THE COMPANY, DATED JULY 7,
     1997, A COPY OF WHICH IS ON FILE AT THE COMPANY'S
     PRINCIPAL EXECUTIVE OFFICE.

8.   Miscellaneous.  

     8.1  Amendment; Waiver.  This Agreement shall not be changed,
          modified or amended in any respect except by the mutual
          written agreement of the parties hereto.  Any provision
          of this Agreement may be waived in writing by the party
          which is entitled to the benefits thereof.  No waiver of
          any provision of this Agreement shall be deemed to, or
          shall constitute a waiver of, any other provision hereof
          or thereof (whether or not similar), nor shall nay such
          waiver constitute a continuing waiver.

     8.2  Binding Effect; Assignment.  Neither this Agreement nor
          any rights or obligations hereunder are assignable by the
          Subscriber.

     8.3  Governing Law; Litigation Costs.  This Agreement and its
          validity, construction and performance shall be governed
          in all respects by the internal laws of the State of
          Delaware without giving effect to such State's conflicts
          of laws provisions.  Each of the Company and the
          Subscriber expressly and irrevocably consent to the
          jurisdiction and venue of the federal courts located in
          Wilmington, Delaware.  Each of the parties agrees that in
          the event either party brings an action to enforce any of
          the provisions of this Agreement or to recovery for an
          alleged breach of any of the provisions of this
          Agreement, each party shall be responsible for its own
          legal costs and disbursements during the pendency of any
          such action; provided, however, that after any such
          action has been reduced to a final, unappealable
          judgment, the prevailing party shall be entitled to
          recover from the other party all reasonable, documented
          attorneys' fees and disbursements and court costs from
          the other party.


                             -14-

     8.4  Severability.  Any term or provisions of this Agreement
          which is prohibited or unenforceable in any jurisdiction
          shall, as to such jurisdiction only, be ineffective only
          to the extent of such prohibition or unenforceability
          without invalidating the remaining provisions hereof
          affecting the validity or enforceability of such
          provision in any other jurisdiction.

     8.5  Headings.  The captions, headings and titles preceding
          the text of each or any Section, subsection or paragraph
          hereof are for convenience of reference only and shall
          not affect the construction, meaning or interpretation of
          this Agreement or any term or provisions hereof.

     8.6  Counterparts.  This Agreement may be executed in one or
          more original or facsimile counterparts, each of which
          shall be deemed an original and all of which shall be
          considered one and the same agreement, binding on all of
          the parties hereto, notwithstanding that all parties are
          not signatories to the same counterpart.  Upon delivery
          of an executed counterpart by the undersigned Subscriber
          to the Company, which in turn is executed and delivered
          by the Company, this Agreement shall be binding as one
          original agreement between Subscriber and the Company.

     8.7  Transfer Taxes.  Each party hereto shall pay all such
          sales, transfer, use, gross receipts, registration and
          similar taxes arising out of, or in connection with, the
          transactions contemplated by this Agreement
          (collectively, the "Transfer Taxes") as are payable by
          such party under applicable law, and the Company shall
          pay the cost of any documentary stock transfer stamps, if
          any, to be affixed to the certificates representing the
          Series 5 Preferred Stock to be sold.

     8.8  Entire Agreement.  This Agreement, along with the
          Certificate of Designations, merges and supersedes any
          and all prior agreements, understandings, discussions,
          assurances, promises, representations or warranties among
          the parties with respect to the subject matter hereof,
          and contains the entire agreement among the parties with
          respect to the subject matter set forth herein and
          therein.

     8.9  Authority; Enforceability.  The Subscriber is duly
          authorized to enter into this Agreement and to perform
          all of its obligations hereunder.  Upon the execution and
          delivery of this Agreement by the Subscriber, this
          Agreement shall be enforceable against the Subscriber in
          accordance with its terms.

     8.10 Notices.  Except as otherwise specified herein to the
          contrary, all notices, requests, demands and other
          communications required or desired to be given hereunder
          shall only be effective if given in writing, by hand or
          by fax, by certified or registered mail, return receipt
          requested, postage prepaid, or by U. S. Express Mail


                              -15-

          service, or by private overnight mail service (e.g.,
          Federal Express).  Any such notice shall be deemed to
          have been given (i) on the business day actually received
          if given by hand or by fax, (ii) on the business day
          immediately subsequent to mailing, if sent by U.S.
          Express Mail service or private overnight mail service,
          or (iii) five (5) business days following the mailing
          thereof, if mailed by certified or registered mail,
          postage prepaid, return receipt requested, and all such
          notices shall be sent to the following addresses (or to
          such other address or addresses as a party may have
          advised the other in the manner provided in this Section
          8.11:

          If to the Company:  Dr. Louis F. Centofanti
                              Perma-Fix Environmental 
                              Services, Inc.
                              1940 Northwest 67th Place
                              Gainesville, Florida  32653
                              Fax No.: (352) 373-0040

          with copies         Irwin H. Steinhorn, Esquire
          simultaneously      Conner & Winters
          by like means to:   One Leadership Square, Suite 1700
                              211 North Robinson
                              Oklahoma City, Oklahoma  73102
                              Fax No.: (405) 232-2695

          If to the           The Infinity Fund, L.P.
          Subscriber:         3 Piedmont Center, Suite 210
                              Atlanta, Georgia 30305
                              Attention:  Mr. Barry Pearl
                              Fax No.: (404) 231-1375

     8.11 No Third Party Beneficiaries.  This Agreement and the
          rights, benefits, privileges, interests, duties and
          obligations contained or referred to herein shall be
          solely for the benefit of the parties hereto and no third
          party shall have any rights or benefits hereunder as a
          third party beneficiary or otherwise hereunder.

     8.12 Public Announcements.  Neither Subscriber nor any
          officer, director, stockholder, employee, affiliate or
          affiliated person or entity of Subscriber, shall make or
          issue any press releases or otherwise make any public
          statements or make any disclosures to any third person or
          entity with respect to the transactions contemplated
          herein and will not make or issue any press releases or
          otherwise make any public statements of any nature
          whatsoever with respect to the Company without the
          express prior approval of the Company.


                             -16-

     IN WITNESS WHEREOF, the Company and the undersigned Subscriber
have each duly executed this Agreement as of this 7th day of July,
1997.

                                   PERMA-FIX ENVIRONMENTAL
                                   SERVICES, INC.



                                   By  /s/ Louis Centofanti
                                      ______________________________
                                         Dr. Louis F. Centofanti
                                         Chief Executive Officer


                                   THE INFINITY FUND, L.P.



                                   By  /s/ Mark Scott
                                     ______________________________
                                     Name:  Mark Scott
                                          _______________________
                                     Title: Executive Director
                                           ______________________




















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