SEE RESTRICTIVE LEGEND ON REVERSE SIDE

                  INCORPORATED UNDER THE LAWS OF
                             DELAWARE

No. - * -                                              Shares ***

              PERMA-FIX ENVIRONMENTAL SERVICES, INC.

           SERIES 7 CLASS G CONVERTIBLE PREFERRED STOCK
                    Par Value $.001 Per Share

THIS CERTIFIES THAT ****SPECIMEN**** is the owner of ********
(****) shares of Series 7 Class G Convertible Preferred Stock of
              Perma-Fix Environmental Services, Inc.
transferrable only on the books of the Corporation by the holder
hereof in person or by attorney upon surrender of this Certificate
properly endorsed.

In Witness Whereof, the said Corporation has caused this
Certificate to be signed by its duly authorized officers and to be
sealed with the Seal of the Corporation this ___ day of November,
1997.


__________________________           __________________________
                Secretary                             President

                       SHARES  $.001  EACH

     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 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 EXCHANGE
AGREEMENT BY AND BETWEEN THE HOLDER HEREOF AND THE COMPANY, DATED
EFFECTIVE AS OF SEPTEMBER 16, 1997, A COPY OF WHICH IS ON FILE AT
THE COMPANY'S PRINCIPAL EXECUTIVE OFFICE.
     THE COMPANY WILL FURNISH WITHOUT CHARGE TO EACH SHAREHOLDER
WHO SO REQUESTS, THE POWERS, DESIGNATIONS, PREFERENCES AND
RELATIVE, PARTICIPATING, OPTIONAL, OR OTHER SPECIAL RIGHTS OF THE
SERIES 7 CLASS G CONVERTIBLE PREFERRED STOCK AND THE
QUALIFICATIONS, LIMITATIONS OR RESTRICTIONS OF SUCH PREFERENCES
AND/OR RIGHTS.
                       *******************
                           CERTIFICATE
                               FOR
                              *****
                              SHARES
                              of the
                          CAPITAL STOCK
                                of
              Perma-Fix Environmental Services, Inc.

           Series 7 Class G Convertible Preferred Stock
                    Par Value $.001 Per Share

                            ISSUED TO
                       *****SPECIMEN******

                              DATED
                        November ___, 1997
                       *******************

     For Value Received, __________ hereby sell, assign and
transfer unto __________________________________________________
___________________ Shares of the Capital Stock represented by the
within Certificate, and do hereby irrevocably constitute and
appoint _________________________________________ to transfer the
said Stock on the books of the within named Corporation with full
power of substitution in the premises.

     Dated __________________, 19______.

     In presence of ________________________________________