EXHIBIT 4.4




THIS WARRANT AND THE SHARES  ISSUABLE UPON THE EXERCISE OF THIS WARRANT HAVE NOT
BEEN  REGISTERED  UNDER  THE  SECURITIES  ACT OF 1933,  AS  AMENDED.  EXCEPT  AS
OTHERWISE  SET FORTH HEREIN OR IN A SECURITIES  PURCHASE  AGREEMENT  DATED AS OF
DECEMBER  11,  2006,  NEITHER  THIS  WARRANT NOR ANY OF SUCH SHARES MAY BE SOLD,
TRANSFERRED  OR ASSIGNED IN THE ABSENCE OF AN EFFECTIVE  REGISTRATION  STATEMENT
FOR SUCH SECURITIES UNDER SAID ACT OR, AN OPINION OF COUNSEL, IN FORM, SUBSTANCE
AND SCOPE,  CUSTOMARY FOR OPINIONS OF COUNSEL IN COMPARABLE  TRANSACTIONS,  THAT
REGISTRATION  IS NOT REQUIRED UNDER SUCH ACT OR UNLESS SOLD PURSUANT TO RULE 144
OR REGULATION S UNDER SUCH ACT.

                                                              Right to
                                                              Purchase 135,000
                                                              Shares of Common
                                                              Stock, par value
                                                              $.01 per share

                             STOCK PURCHASE WARRANT

     THIS  CERTIFIES  THAT,  for  value  received,  AJW  Partners,  LLC  or  its
registered  assigns,  is  entitled  to purchase  from  Avitar  Inc.,  a Delaware
corporation (the "Company"),  at any time or from time to time during the period
specified in Paragraph 2 hereof,  135,000 fully paid and nonassessable shares of
the Company's Common Stock, par value $.01 per share (the "Common Stock"), at an
exercise price per share equal to $.15 (the "Exercise Price"). The term "Warrant
Shares,"  as used  herein,  refers to the  shares of  Common  Stock  purchasable
hereunder.  The Warrant  Shares and the Exercise Price are subject to adjustment
as provided in Paragraph 4 hereof.  The term  "Warrants"  means this Warrant and
the  other  warrants  issued  pursuant  to  that  certain  Securities   Purchase
Agreement,  dated  December  11,  2006,  by and among the Company and the Buyers
listed on the execution page thereof (the "Securities Purchase Agreement").

     This Warrant is subject to the following terms, provisions, and conditions:

1. Manner of Exercise; Issuance of Certificates;  Payment for Shares. Subject to
the provisions  hereof,  this Warrant may be exercised by the holder hereof,  in
whole or in part, by the  surrender of this  Warrant,  together with a completed
exercise  agreement in the form attached hereto (the "Exercise  Agreement"),  to
the Company  during normal  business  hours on any business day at the Company's
principal executive offices (or such other office or agency of the Company as it
may  designate  by notice to the  holder  hereof),  and upon (i)  payment to the
Company in cash, by certified or official bank check or by wire transfer for the
account of the Company of the Exercise Price for the Warrant Shares specified in
the Exercise Agreement or (ii) if the resale of the Warrant Shares by the holder
is not then registered pursuant to an effective registration statement under the
Securities  Act of 1933,  as amended  (the  "Securities  Act"),  delivery to the
Company of a written  notice of an election to effect a "Cashless  Exercise" (as
defined in Section 11(c) below) for the Warrant Shares specified in the Exercise
Agreement.  The Warrant Shares so purchased  shall be deemed to be issued to the
holder hereof or such holder's designee,  as the record owner of such shares, as
of the close of  business  on the date on which  this  Warrant  shall  have been
surrendered,  the completed  Exercise  Agreement shall have been delivered,  and
payment  shall have been made for such shares as set forth  above.  Certificates
for the Warrant Shares so purchased, representing the aggregate number of shares
specified in the  Exercise  Agreement,  shall be delivered to the holder  hereof
within a reasonable  time,  not  exceeding  five (5) business  days,  after this
Warrant shall have been so exercised.  The certificates so delivered shall be in
such  denominations  as may be  requested  by the  holder  hereof  and  shall be
registered  in the name of such holder or such other name as shall be designated
by such holder.  If this Warrant shall have been exercised  only in part,  then,
unless this Warrant has expired,  the Company shall, at its expense, at the time
of  delivery  of  such  certificates,  deliver  to  the  holder  a  new  Warrant
representing  the number of shares with respect to which this Warrant  shall not
then have been exercised.  In addition to all other available remedies at law or
in equity,  if the Company fails to deliver  certificates for the Warrant Shares
within five (5) business days after this Warrant is exercised,  then the Company
shall pay to the  holder in cash a penalty  (the  "Penalty")  equal to 2% of the
number of Warrant Shares that the holder is entitled to multiplied by the Market
Price (as  hereinafter  defined) for each day that the Company  fails to deliver
certificates for the Warrant Shares.  For example,  if the holder is entitled to
100,000 Warrant Shares and the Market Price is $2.00, then the Company shall pay
to the holder $4,000 for each day that the Company fails to deliver certificates
for the Warrant Shares. The Penalty shall be paid to the holder by the fifth day
of the month following the month in which it has accrued.

     Notwithstanding anything in this Warrant to the contrary, in no event shall
the holder of this  Warrant be entitled  to  exercise a number of  Warrants  (or
portions thereof) in excess of the number of Warrants (or portions thereof) upon
exercise  of  which  the  sum of (i)  the  number  of  shares  of  Common  Stock
beneficially owned by the holder and its affiliates (other than shares of Common
Stock  which may be deemed  beneficially  owned  through  the  ownership  of the
unexercised  Warrants and the  unexercised or  unconverted  portion of any other
securities  of the Company  (including  the Notes (as defined in the  Securities
Purchase Agreement)) subject to a limitation on conversion or exercise analogous
to the  limitation  contained  herein)  and (ii) the  number of shares of Common
Stock issuable upon exercise of the Warrants (or portions  thereof) with respect
to which the  determination  described  herein is being  made,  would  result in
beneficial  ownership by the holder and its  affiliates of more than 4.9% of the
outstanding  shares of Common Stock.  For purposes of the immediately  preceding
sentence,  beneficial  ownership  shall be determined in accordance with Section
13(d) of the Securities  Exchange Act of 1934, as amended,  and Regulation 13D-G
thereunder,  except  as  otherwise  provided  in  clause  (i) of  the  preceding
sentence.  Notwithstanding  anything  to  the  contrary  contained  herein,  the
limitation  on  exercise  of this  Warrant  set forth  herein may not be amended
without  (i) the written  consent of the holder  hereof and the Company and (ii)
the approval of a majority of shareholders of the Company.

2. Period of Exercise.  This Warrant is  exercisable at any time or from time to
time on or after the date on which this Warrant is issued and delivered pursuant
to the terms of the  Securities  Purchase  Agreement  and before 6:00 p.m.,  New
York,  New York time on the seventh  (7th)  anniversary  of the date of issuance
(the "Exercise Period").

3. Certain Agreements of the Company. The Company hereby covenants and agrees as
follows:

     (a) Shares to be Fully Paid.  All Warrant  Shares  will,  upon  issuance in
accordance with the terms of this Warrant,  be validly  issued,  fully paid, and
nonassessable  and free from all taxes,  liens,  and charges with respect to the
issue thereof.

     (b) Reservation of Shares. During the Exercise Period, the Company shall at
all times  have  authorized,  and  reserved  for the  purpose of  issuance  upon
exercise  of this  Warrant,  a  sufficient  number of shares of Common  Stock to
provide for the exercise of this Warrant.

     (c) Listing. The Company shall promptly secure the listing of the shares of
Common Stock issuable upon exercise of the Warrant upon each national securities
exchange or  automated  quotation  system,  if any,  upon which shares of Common
Stock are then listed  (subject to official  notice of issuance upon exercise of
this  Warrant) and shall  maintain,  so long as any other shares of Common Stock
shall be so listed, such listing of all shares of Common Stock from time to time
issuable  upon the exercise of this  Warrant;  and the Company  shall so list on
each national securities exchange or automated quotation system, as the case may
be, and shall maintain such listing of, any other shares of capital stock of the
Company  issuable upon the exercise of this Warrant if and so long as any shares
of the same  class  shall be  listed on such  national  securities  exchange  or
automated quotation system.

     (d) Certain Actions  Prohibited.  The Company will not, by amendment of its
charter or  through  any  reorganization,  transfer  of  assets,  consolidation,
merger, dissolution, issue or sale of securities, or any other voluntary action,
avoid or seek to avoid the  observance or  performance of any of the terms to be
observed  or  performed  by it  hereunder,  but will at all times in good  faith
assist in the  carrying  out of all the  provisions  of this  Warrant and in the
taking of all such action as may  reasonably  be requested by the holder of this
Warrant in order to protect the exercise privilege of the holder of this Warrant
against dilution or other  impairment,  consistent with the tenor and purpose of
this Warrant.  Without limiting the generality of the foregoing, the Company (i)
will not increase the par value of any shares of Common  Stock  receivable  upon
the exercise of this Warrant above the Exercise  Price then in effect,  and (ii)
will take all such actions as may be necessary or  appropriate in order that the
Company may validly and  legally  issue fully paid and  nonassessable  shares of
Common Stock upon the exercise of this Warrant.

     (e)  Successors  and Assigns.  This Warrant will be binding upon any entity
succeeding to the Company by merger,  consolidation,  or  acquisition  of all or
substantially all the Company's assets.

4. Antidilution  Provisions.  During the Exercise Period, the Exercise Price and
the number of Warrant Shares shall be subject to adjustment from time to time as
provided in this Paragraph 4.

     In the event that any adjustment of the Exercise  Price as required  herein
results in a fraction of a cent,  such Exercise Price shall be rounded up to the
nearest cent.

     (a)  Adjustment  of Exercise  Price and Number of Shares  upon  Issuance of
Common Stock.  Except as otherwise  provided in Paragraphs 4(c) and 4(e) hereof,
if and  whenever on or after the date of issuance of this  Warrant,  the Company
issues or sells,  or in accordance  with Paragraph 4(b) hereof is deemed to have
issued  or sold,  any  shares  of Common  Stock  for no  consideration  or for a
consideration per share (before deduction of reasonable  expenses or commissions
or underwriting  discounts or allowances in connection  therewith) less than the
Market Price on the date of issuance (a "Dilutive  Issuance"),  then immediately
upon the  Dilutive  Issuance,  the  Exercise  Price  will be  reduced to a price
determined by multiplying the Exercise Price in effect  immediately prior to the
Dilutive  Issuance by a fraction,  (i) the numerator of which is an amount equal
to the sum of (x) the  number of shares of  Common  Stock  actually  outstanding
immediately  prior  to the  Dilutive  Issuance,  plus  (y) the  quotient  of the
aggregate  consideration,  calculated  as set forth in  Paragraph  4(b)  hereof,
received by the Company upon such Dilutive  Issuance divided by the Market Price
in effect immediately prior to the Dilutive  Issuance,  and (ii) the denominator
of which is the total number of shares of Common Stock  Deemed  Outstanding  (as
defined below) immediately after the Dilutive Issuance.

     (b) Effect on Exercise Price of Certain Events. For purposes of determining
the adjusted  Exercise Price under Paragraph 4(a) hereof,  the following will be
applicable:

          (i) Issuance of Rights or Options. If the Company in any manner issues
     or grants any  warrants,  rights or  options,  whether  or not  immediately
     exercisable,  to  subscribe  for  or to  purchase  Common  Stock  or  other
     securities  convertible into or exchangeable for Common Stock ("Convertible
     Securities") (such warrants, rights and options to purchase Common Stock or
     Convertible  Securities are  hereinafter  referred to as "Options") and the
     price per share for which  Common  Stock is issuable  upon the  exercise of
     such Options is less than the Market Price on the date of issuance or grant
     of such  Options,  then the maximum  total number of shares of Common Stock
     issuable  upon the exercise of all such Options will, as of the date of the
     issuance or grant of such Options,  be deemed to be outstanding and to have
     been issued and sold by the Company for such price per share.  For purposes
     of the preceding  sentence,  the "price per share for which Common Stock is
     issuable  upon the exercise of such  Options" is determined by dividing (i)
     the  total  amount,  if any,  received  or  receivable  by the  Company  as
     consideration  for the issuance or granting of all such  Options,  plus the
     minimum  aggregate amount of additional  consideration,  if any, payable to
     the Company upon the  exercise of all such  Options,  plus,  in the case of
     Convertible  Securities  issuable  upon the exercise of such  Options,  the
     minimum  aggregate  amount of  additional  consideration  payable  upon the
     conversion  or  exchange  thereof at the time such  Convertible  Securities
     first become convertible or exchangeable,  by (ii) the maximum total number
     of shares of Common  Stock  issuable  upon the exercise of all such Options
     (assuming full conversion of Convertible  Securities,  if  applicable).  No
     further  adjustment  to the  Exercise  Price  will be made upon the  actual
     issuance of such Common Stock upon the exercise of such Options or upon the
     conversion or exchange of Convertible  Securities issuable upon exercise of
     such Options.

          (ii) Issuance of Convertible Securities.  If the Company in any manner
     issues or sells any  Convertible  Securities,  whether  or not  immediately
     convertible  (other than where the same are  issuable  upon the exercise of
     Options) and the price per share for which  Common  Stock is issuable  upon
     such  conversion  or exchange is less than the Market  Price on the date of
     issuance,  then the maximum total number of shares of Common Stock issuable
     upon the conversion or exchange of all such Convertible Securities will, as
     of the date of the issuance of such Convertible Securities, be deemed to be
     outstanding  and to have been issued and sold by the Company for such price
     per share. For the purposes of the preceding sentence, the "price per share
     for which Common  Stock is issuable  upon such  conversion  or exchange" is
     determined by dividing (i) the total amount, if any, received or receivable
     by the  Company  as  consideration  for the  issuance  or sale of all  such
     Convertible  Securities,  plus the minimum  aggregate  amount of additional
     consideration,  if any,  payable  to the  Company  upon the  conversion  or
     exchange  thereof  at the time such  Convertible  Securities  first  become
     convertible or exchangeable,  by (ii) the maximum total number of shares of
     Common  Stock  issuable  upon  the  conversion  or  exchange  of  all  such
     Convertible Securities. No further adjustment to the Exercise Price will be
     made upon the actual  issuance  of such  Common  Stock upon  conversion  or
     exchange of such Convertible Securities.

          (iii) Change in Option Price or Conversion  Rate. If there is a change
     at any time in (i) the amount of  additional  consideration  payable to the
     Company  upon the exercise of any  Options;  (ii) the amount of  additional
     consideration,  if any,  payable  to the  Company  upon the  conversion  or
     exchange  of any  Convertible  Securities;  or (iii)  the rate at which any
     Convertible  Securities are  convertible  into or  exchangeable  for Common
     Stock  (other  than under or by reason of  provisions  designed  to protect
     against dilution),  the Exercise Price in effect at the time of such change
     will be readjusted to the Exercise Price which would have been in effect at
     such time had such  Options or  Convertible  Securities  still  outstanding
     provided for such changed  additional  consideration or changed  conversion
     rate, as the case may be, at the time initially granted, issued or sold.

          (iv)  Treatment  of  Expired  Options  and   Unexercised   Convertible
     Securities.  If, in any case,  the total  number of shares of Common  Stock
     issuable upon exercise of any Option or upon  conversion or exchange of any
     Convertible  Securities is not, in fact,  issued and the rights to exercise
     such Option or to convert or exchange  such  Convertible  Securities  shall
     have  expired or  terminated,  the  Exercise  Price then in effect  will be
     readjusted  to the  Exercise  Price  which would have been in effect at the
     time of such  expiration  or  termination  had such  Option or  Convertible
     Securities,  to the extent outstanding immediately prior to such expiration
     or  termination  (other  than in respect of the actual  number of shares of
     Common  Stock  issued upon  exercise  or  conversion  thereof),  never been
     issued.

          (v)  Calculation  of  Consideration  Received.  If any  Common  Stock,
     Options or Convertible Securities are issued, granted or sold for cash, the
     consideration  received  therefor  for purposes of this Warrant will be the
     amount  received by the Company  therefor,  before  deduction of reasonable
     commissions,  underwriting  discounts  or  allowances  or other  reasonable
     expenses paid or incurred by the Company in connection  with such issuance,
     grant or sale. In case any Common Stock, Options or Convertible  Securities
     are issued or sold for a consideration  part or all of which shall be other
     than cash, the amount of the consideration  other than cash received by the
     Company  will be the fair value of such  consideration,  except  where such
     consideration  consists  of  securities,   in  which  case  the  amount  of
     consideration  received by the Company will be the Market Price  thereof as
     of the date of receipt.  In case any Common Stock,  Options or  Convertible
     Securities  are  issued  in  connection  with any  acquisition,  merger  or
     consolidation in which the Company is the surviving corporation, the amount
     of  consideration  therefor  will be  deemed  to be the fair  value of such
     portion of the net assets and business of the non-surviving  corporation as
     is attributable to such Common Stock, Options or Convertible Securities, as
     the case may be.  The fair  value of any  consideration  other than cash or
     securities  will be  determined  in good faith by the Board of Directors of
     the Company.

          (vi)  Exceptions to Adjustment of Exercise Price. No adjustment to the
     Exercise Price will be made (i) upon the exercise of any warrants,  options
     or convertible  securities  granted,  issued and outstanding on the date of
     issuance of this  Warrant;  (ii) upon the grant or exercise of any stock or
     options  which may  hereafter  be granted or  exercised  under any employee
     benefit plan, stock option plan or restricted stock plan of the Company now
     existing or to be  implemented  in the future,  so long as the  issuance of
     such stock or options is approved by a majority of the independent  members
     of the Board of  Directors of the Company or a majority of the members of a
     committee of independent  directors  established for such purpose; or (iii)
     upon the exercise of the Warrants.

     (c)  Subdivision or Combination of Common Stock. If the Company at any time
subdivides   (by   any   stock   split,   stock   dividend,    recapitalization,
reorganization,  reclassification  or  otherwise)  the  shares of  Common  Stock
acquirable  hereunder into a greater number of shares,  then,  after the date of
record for effecting such subdivision,  the Exercise Price in effect immediately
prior to such subdivision will be proportionately reduced. If the Company at any
time  combines  (by  reverse  stock  split,  recapitalization,   reorganization,
reclassification  or otherwise) the shares of Common Stock acquirable  hereunder
into a smaller  number of shares,  then,  after the date of record for effecting
such  combination,  the  Exercise  Price  in  effect  immediately  prior to such
combination will be proportionately increased.

     (d)  Adjustment in Number of Shares.  Upon each  adjustment of the Exercise
Price  pursuant to the  provisions of this  Paragraph 4, the number of shares of
Common  Stock  issuable  upon  exercise  of this  Warrant  shall be  adjusted by
multiplying a number equal to the Exercise Price in effect  immediately prior to
such  adjustment by the number of shares of Common Stock  issuable upon exercise
of this Warrant immediately prior to such adjustment and dividing the product so
obtained by the adjusted Exercise Price.

     (e)  Consolidation,  Merger or Sale.  In case of any  consolidation  of the
Company with, or merger of the Company into any other corporation, or in case of
any sale or conveyance of all or substantially  all of the assets of the Company
other than in  connection  with a plan of complete  liquidation  of the Company,
then  as a  condition  of such  consolidation,  merger  or  sale or  conveyance,
adequate provision will be made whereby the holder of this Warrant will have the
right to acquire and receive upon exercise of this Warrant in lieu of the shares
of Common Stock  immediately  theretofore  acquirable  upon the exercise of this
Warrant, such shares of stock,  securities or assets as may be issued or payable
with  respect  to or in  exchange  for the  number of  shares  of  Common  Stock
immediately  theretofore acquirable and receivable upon exercise of this Warrant
had such  consolidation,  merger or sale or conveyance  not taken place.  In any
such case,  the  Company  will make  appropriate  provision  to insure  that the
provisions of this Paragraph 4 hereof will thereafter be applicable as nearly as
may be in relation to any shares of stock or securities  thereafter  deliverable
upon  the   exercise  of  this   Warrant.   The  Company  will  not  effect  any
consolidation,  merger or sale or  conveyance  unless prior to the  consummation
thereof,  the  successor  corporation  (if other  than the  Company)  assumes by
written instrument the obligations under this Paragraph 4 and the obligations to
deliver to the holder of this Warrant such shares of stock, securities or assets
as, in accordance with the foregoing  provisions,  the holder may be entitled to
acquire.

     (f)  Distribution of Assets.  In case the Company shall declare or make any
distribution  of its assets  (including  cash) to  holders of Common  Stock as a
partial liquidating  dividend,  by way of return of capital or otherwise,  then,
after  the  date  of  record  for  determining  shareholders  entitled  to  such
distribution,  but prior to the date of distribution, the holder of this Warrant
shall be entitled  upon  exercise of this Warrant for the purchase of any or all
of the shares of Common  Stock  subject  hereto,  to receive  the amount of such
assets  which  would have been  payable to the holder had such  holder  been the
holder of such shares of Common  Stock on the record date for the  determination
of shareholders entitled to such distribution.

     (g) Notice of  Adjustment.  Upon the occurrence of any event which requires
any adjustment of the Exercise  Price,  then, and in each such case, the Company
shall give notice  thereof to the holder of this  Warrant,  which  notice  shall
state the Exercise  Price  resulting  from such  adjustment  and the increase or
decrease  in the  number  of  Warrant  Shares  purchasable  at such  price  upon
exercise,  setting forth in reasonable  detail the method of calculation and the
facts upon which such calculation is based.  Such calculation shall be certified
by the Chief Financial Officer of the Company.

     (h) Minimum  Adjustment  of Exercise  Price.  No adjustment of the Exercise
Price shall be made in an amount of less than 1% of the Exercise Price in effect
at the time such  adjustment  is  otherwise  required  to be made,  but any such
lesser  adjustment  shall be carried  forward  and shall be made at the time and
together  with  the  next  subsequent   adjustment  which,   together  with  any
adjustments  so  carried  forward,  shall  amount  to not  less  than 1% of such
Exercise Price.

     (i) No Fractional  Shares.  No fractional  shares of Common Stock are to be
issued upon the  exercise  of this  Warrant,  but the  Company  shall pay a cash
adjustment in respect of any fractional  share which would otherwise be issuable
in an amount equal to the same fraction of the Market Price of a share of Common
Stock on the date of such exercise.

     (j) Other Notices. In case at any time:

          (i) the Company  shall  declare  any  dividend  upon the Common  Stock
     payable  in shares  of stock of any  class or make any  other  distribution
     (including  dividends  or  distributions  payable  in cash out of  retained
     earnings) to the holders of the Common Stock;

          (ii) the Company shall offer for  subscription pro rata to the holders
     of the Common  Stock any  additional  shares of stock of any class or other
     rights;

          (iii) there shall be any capital  reorganization  of the  Company,  or
     reclassification  of the Common Stock,  or  consolidation  or merger of the
     Company with or into,  or sale of all or  substantially  all its assets to,
     another corporation or entity; or

          (iv)  there  shall  be  a  voluntary   or   involuntary   dissolution,
     liquidation or winding up of the Company;

then,  in each such case,  the Company  shall give to the holder of this Warrant
(a) notice of the date on which the books of the Company shall close or a record
shall be taken for  determining  the holders of Common Stock entitled to receive
any such dividend,  distribution,  or subscription rights or for determining the
holders of Common Stock entitled to vote in respect of any such  reorganization,
reclassification,  consolidation,  merger,  sale,  dissolution,  liquidation  or
winding-up  and (b) in the  case of any such  reorganization,  reclassification,
consolidation,  merger, sale, dissolution,  liquidation or winding-up, notice of
the date (or,  if not then  known,  a  reasonable  approximation  thereof by the
Company) when the same shall take place. Such notice shall also specify the date
on which the holders of Common Stock shall be entitled to receive such dividend,
distribution, or subscription rights or to exchange their Common Stock for stock
or  other  securities  or  property   deliverable   upon  such   reorganization,
reclassification,  consolidation,  merger, sale,  dissolution,  liquidation,  or
winding-up,  as the case  may be.  Such  notice  shall be given at least 30 days
prior to the record date or the date on which the Company's  books are closed in
respect thereto. Failure to give any such notice or any defect therein shall not
affect the validity of the proceedings  referred to in clauses (i), (ii),  (iii)
and (iv) above.

     (k) Certain  Events.  If any event occurs of the type  contemplated  by the
adjustment provisions of this Paragraph 4 but not expressly provided for by such
provisions,  the Company will give notice of such event as provided in Paragraph
4(g)  hereof,  and the  Company's  Board of Directors  will make an  appropriate
adjustment  in the  Exercise  Price and the  number  of  shares of Common  Stock
acquirable  upon exercise of this Warrant so that the rights of the holder shall
be neither enhanced nor diminished by such event.

     (l) Certain Definitions.

          (i) "Common Stock Deemed  Outstanding" shall mean the number of shares
     of Common Stock actually  outstanding (not including shares of Common Stock
     held in the  treasury  of the  Company),  plus (x)  pursuant  to  Paragraph
     4(b)(i) hereof, the maximum total number of shares of Common Stock issuable
     upon the exercise of Options,  as of the date of such  issuance or grant of
     such Options,  if any, and (y) pursuant to Paragraph  4(b)(ii) hereof,  the
     maximum total number of shares of Common Stock issuable upon  conversion or
     exchange  of  Convertible  Securities,  as of the date of  issuance of such
     Convertible Securities, if any.

          (ii) "Market Price," as of any date, (i) means the average of the last
     reported  sale  prices for the shares of Common  Stock on the OTCBB for the
     five (5)  Trading  Days  immediately  preceding  such date as  reported  by
     Bloomberg, or (ii) if the OTCBB is not the principal trading market for the
     shares of Common Stock, the average of the last reported sale prices on the
     principal  trading  market for the Common  Stock  during the same period as
     reported by Bloomberg,  or (iii) if market value cannot be calculated as of
     such date on any of the foregoing bases, the Market Price shall be the fair
     market  value as  reasonably  determined  in good faith by (a) the Board of
     Directors of the Company or, at the option of a majority-in-interest of the
     holders of the outstanding  Warrants by (b) an independent  investment bank
     of nationally recognized standing in the valuation of businesses similar to
     the business of the corporation. The manner of determining the Market Price
     of the Common Stock set forth in the foregoing  definition shall apply with
     respect to any other  security  in respect of which a  determination  as to
     market value must be made hereunder.

          (iii) "Common  Stock," for purposes of this  Paragraph 4, includes the
     Common Stock,  par value $.01 per share,  and any additional class of stock
     of the Company  having no  preference as to dividends or  distributions  on
     liquidation,  provided that the shares purchasable pursuant to this Warrant
     shall  include only shares of Common  Stock,  par value $.01 per share,  in
     respect of which this Warrant is exercisable,  or shares resulting from any
     subdivision  or  combination  of such Common  Stock,  or in the case of any
     reorganization,  reclassification,  consolidation,  merger,  or sale of the
     character  referred  to in  Paragraph  4(e)  hereof,  the  stock  or  other
     securities or property provided for in such Paragraph.

5. Issue Tax. The issuance of certificates  for Warrant Shares upon the exercise
of this Warrant  shall be made  without  charge to the holder of this Warrant or
such shares for any  issuance  tax or other costs in respect  thereof,  provided
that the  Company  shall not be  required to pay any tax which may be payable in
respect of any transfer involved in the issuance and delivery of any certificate
in a name other than the holder of this Warrant.

6. No Rights or Liabilities as a Shareholder. This Warrant shall not entitle the
holder  hereof to any  voting  rights or other  rights as a  shareholder  of the
Company.  No provision of this Warrant,  in the absence of affirmative action by
the holder hereof to purchase Warrant Shares,  and no mere enumeration herein of
the rights or privileges of the holder hereof,  shall give rise to any liability
of such  holder  for the  Exercise  Price or as a  shareholder  of the  Company,
whether  such  liability  is  asserted  by the  Company or by  creditors  of the
Company.

7. Transfer, Exchange, and Replacement of Warrant.

     (a)  Restriction  on Transfer.  This Warrant and the rights  granted to the
holder  hereof are  transferable,  in whole or in part,  upon  surrender of this
Warrant,  together  with a properly  executed  assignment  in the form  attached
hereto,  at the office or agency of the Company  referred to in  Paragraph  7(e)
below,  provided,  however,  that any transfer or assignment shall be subject to
the  conditions  set  forth  in  Paragraph  7(f)  hereof  and to the  applicable
provisions of the  Securities  Purchase  Agreement.  Until due  presentment  for
registration of transfer on the books of the Company,  the Company may treat the
registered  holder hereof as the owner and holder  hereof for all purposes,  and
the Company shall not be affected by any notice to the contrary. Notwithstanding
anything to the contrary contained herein, the registration  rights described in
Paragraph  8 are  assignable  only in  accordance  with the  provisions  of that
certain  Registration  Rights Agreement,  dated September 12, 2006, by and among
the  Company  and  the  other  signatories  thereto  (the  "Registration  Rights
Agreement").

     (b) Warrant  Exchangeable  for  Different  Denominations.  This  Warrant is
exchangeable,  upon the  surrender  hereof by the holder hereof at the office or
agency of the Company  referred to in Paragraph 7(e) below,  for new Warrants of
like tenor  representing  in the  aggregate  the right to purchase the number of
shares  of  Common  Stock  which may be  purchased  hereunder,  each of such new
Warrants to  represent  the right to purchase  such number of shares as shall be
designated by the holder hereof at the time of such surrender.

     (c)   Replacement   of  Warrant.   Upon  receipt  of  evidence   reasonably
satisfactory to the Company of the loss,  theft,  destruction,  or mutilation of
this  Warrant and, in the case of any such loss,  theft,  or  destruction,  upon
delivery of an indemnity agreement reasonably satisfactory in form and amount to
the  Company,  or,  in the  case of any  such  mutilation,  upon  surrender  and
cancellation  of this  Warrant,  the Company,  at its expense,  will execute and
deliver, in lieu thereof, a new Warrant of like tenor.

     (d) Cancellation;  Payment of Expenses.  Upon the surrender of this Warrant
in connection  with any transfer,  exchange,  or replacement as provided in this
Paragraph 7, this Warrant shall be promptly canceled by the Company. The Company
shall  pay all  taxes  (other  than  securities  transfer  taxes)  and all other
expenses  (other  than  legal  expenses,  if  any,  incurred  by the  holder  or
transferees) and charges payable in connection with the preparation,  execution,
and delivery of Warrants pursuant to this Paragraph 7.

     (e)  Register.  The Company  shall  maintain,  at its  principal  executive
offices (or such other  office or agency of the Company as it may  designate  by
notice to the holder hereof), a register for this Warrant,  in which the Company
shall  record the name and address of the person in whose name this  Warrant has
been issued,  as well as the name and address of each  transferee and each prior
owner of this Warrant.

     (f)  Exercise  or  Transfer  Without  Registration.  If, at the time of the
surrender of this Warrant in connection with any exercise, transfer, or exchange
of this  Warrant,  this  Warrant (or, in the case of any  exercise,  the Warrant
Shares issuable hereunder),  shall not be registered under the Securities Act of
1933, as amended (the "Securities Act") and under applicable state securities or
blue sky laws,  the  Company  may  require,  as a  condition  of  allowing  such
exercise,  transfer,  or  exchange,  (i) that the holder or  transferee  of this
Warrant,  as the case may be,  furnish  to the  Company  a  written  opinion  of
counsel,  which opinion and counsel are acceptable to the Company, to the effect
that such exercise, transfer, or exchange may be made without registration under
said Act and under  applicable  state securities or blue sky laws, (ii) that the
holder or transferee  execute and deliver to the Company an investment letter in
form and substance acceptable to the Company and (iii) that the transferee be an
"accredited investor" as defined in Rule 501(a) promulgated under the Securities
Act; provided that no such opinion, letter or status as an "accredited investor"
shall be required in connection  with a transfer  pursuant to Rule 144 under the
Securities  Act.  The first  holder of this  Warrant,  by taking and holding the
same,  represents to the Company that such holder is acquiring  this Warrant for
investment and not with a view to the distribution thereof.

8.  Registration  Rights.  The  initial  holder  of this  Warrant  (and  certain
assignees  thereof) is entitled  to the benefit of such  registration  rights in
respect of the Warrant Shares as are set forth in Section 2 of the  Registration
Rights Agreement.

9.  Notices.  All  notices,  requests,  and  other  communications  required  or
permitted to be given or delivered hereunder to the holder of this Warrant shall
be in writing, and shall be personally delivered,  or shall be sent by certified
or registered mail or by recognized overnight mail courier,  postage prepaid and
addressed,  to such holder at the address  shown for such holder on the books of
the  Company,  or at such  other  address as shall  have been  furnished  to the
Company  by  notice  from  such  holder.  All  notices,   requests,   and  other
communications  required or permitted to be given or delivered  hereunder to the
Company shall be in writing, and shall be personally delivered, or shall be sent
by certified or registered mail or by recognized overnight mail courier, postage
prepaid and addressed,  to the office of the Company at 65 Dan Road,  Canton, MA
02021,  Attention:  Chief Executive  Officer,  or at such other address as shall
have been  furnished  to the holder of this  Warrant by notice from the Company.
Any such notice,  request, or other communication may be sent by facsimile,  but
shall in such case be subsequently  confirmed by a writing personally  delivered
or sent by certified or registered mail or by recognized  overnight mail courier
as provided above.  All notices,  requests,  and other  communications  shall be
deemed  to have been  given  either at the time of the  receipt  thereof  by the
person  entitled  to  receive  such  notice at the  address  of such  person for
purposes of this  Paragraph 9, or, if mailed by registered or certified  mail or
with a recognized  overnight  mail  courier upon deposit with the United  States
Post  Office or such  overnight  mail  courier,  if postage  is prepaid  and the
mailing is properly addressed, as the case may be.

10. Governing Law. THIS WARRANT SHALL BE ENFORCED,  GOVERNED BY AND CONSTRUED IN
ACCORDANCE  WITH THE LAWS OF THE STATE OF NEW YORK APPLICABLE TO AGREEMENTS MADE
AND TO BE PERFORMED ENTIRELY WITHIN SUCH STATE, WITHOUT REGARD TO THE PRINCIPLES
OF  CONFLICT  OF  LAWS.  THE  PARTIES  HERETO  HEREBY  SUBMIT  TO THE  EXCLUSIVE
JURISDICTION  OF THE UNITED STATES  FEDERAL COURTS LOCATED IN NEW YORK, NEW YORK
WITH RESPECT TO ANY DISPUTE ARISING UNDER THIS WARRANT,  THE AGREEMENTS  ENTERED
INTO IN CONNECTION HEREWITH OR THE TRANSACTIONS  CONTEMPLATED HEREBY OR THEREBY.
BOTH  PARTIES  IRREVOCABLY  WAIVE THE  DEFENSE OF AN  INCONVENIENT  FORUM TO THE
MAINTENANCE OF SUCH SUIT OR PROCEEDING.  BOTH PARTIES FURTHER AGREE THAT SERVICE
OF  PROCESS  UPON A PARTY  MAILED BY FIRST  CLASS  MAIL SHALL BE DEEMED IN EVERY
RESPECT  EFFECTIVE  SERVICE  OF  PROCESS  UPON THE  PARTY  IN ANY  SUCH  SUIT OR
PROCEEDING. NOTHING HEREIN SHALL AFFECT EITHER PARTY'S RIGHT TO SERVE PROCESS IN
ANY  OTHER  MANNER   PERMITTED  BY  LAW.   BOTH  PARTIES   AGREE  THAT  A  FINAL
NON-APPEALABLE  JUDGMENT IN ANY SUCH SUIT OR PROCEEDING  SHALL BE CONCLUSIVE AND
MAY BE ENFORCED IN OTHER  JURISDICTIONS BY SUIT ON SUCH JUDGMENT OR IN ANY OTHER
LAWFUL  MANNER.  THE PARTY WHICH DOES NOT PREVAIL IN ANY DISPUTE  ARISING  UNDER
THIS  WARRANT  SHALL  BE  RESPONSIBLE  FOR  ALL  FEES  AND  EXPENSES,  INCLUDING
ATTORNEYS'  FEES,  INCURRED  BY THE  PREVAILING  PARTY IN  CONNECTION  WITH SUCH
DISPUTE.

11. Miscellaneous.

     (a) Amendments.  This Warrant and any provision  hereof may only be amended
by an instrument in writing signed by the Company and the holder hereof.

     (b)  Descriptive   Headings.   The  descriptive  headings  of  the  several
paragraphs  of this Warrant are inserted  for  purposes of reference  only,  and
shall not affect the meaning or construction of any of the provisions hereof.

     (c) Cashless Exercise.  Notwithstanding  anything to the contrary contained
in this Warrant,  if the resale of the Warrant  Shares by the holder is not then
registered pursuant to an effective  registration statement under the Securities
Act, this Warrant may be exercised by presentation and surrender of this Warrant
to the Company at its principal  executive  offices with a written notice of the
holder's intention to effect a cashless exercise, including a calculation of the
number of shares of Common Stock to be issued upon such  exercise in  accordance
with the  terms  hereof (a  "Cashless  Exercise").  In the  event of a  Cashless
Exercise,  in lieu of  paying  the  Exercise  Price in cash,  the  holder  shall
surrender  this Warrant for that number of shares of Common Stock  determined by
multiplying the number of Warrant Shares to which it would otherwise be entitled
by a fraction,  the numerator of which shall be the difference  between the then
current Market Price per share of the Common Stock and the Exercise  Price,  and
the  denominator  of which shall be the then  current  Market Price per share of
Common Stock. For example,  if the holder is exercising  100,000 Warrants with a
per Warrant  exercise price of $0.75 per share through a cashless  exercise when
the Common Stock's current Market Price per share is $2.00 per share,  then upon
such Cashless Exercise the holder will receive 62,500 shares of Common Stock.

     (d)  Remedies.  The  Company  acknowledges  that  a  breach  by it  of  its
obligations  hereunder will cause  irreparable harm to the holder,  by vitiating
the intent and purpose of the transaction contemplated hereby. Accordingly,  the
Company  acknowledges  that the  remedy at law for a breach  of its  obligations
under this Warrant will be  inadequate  and agrees,  in the event of a breach or
threatened  breach by the Company of the  provisions of this  Warrant,  that the
holder shall be entitled,  in addition to all other available remedies at law or
in equity, and in addition to the penalties  assessable herein, to an injunction
or injunctions restraining,  preventing or curing any breach of this Warrant and
to enforce specifically the terms and provisions thereof,  without the necessity
of showing economic loss and without any bond or other security being required.






                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]



     IN WITNESS WHEREOF, the Company has caused this Warrant to be signed by its
duly authorized officer.

                                             AVITAR INC.



                                             By: _______________________________
                                                  Peter Phildius
                                                  Chief Executive Officer


Dated as of December 11, 2006


PHL_A #1956552 v1
                                            FORM OF EXERCISE AGREEMENT



                                                      Dated:  ________ __, 200_



To:      ______________________





     The  undersigned,  pursuant  to the  provisions  set  forth  in the  within
Warrant,  hereby agrees to purchase  ________  shares of Common Stock covered by
such Warrant, and makes payment herewith in full therefor at the price per share
provided by such Warrant in cash or by  certified or official  bank check in the
amount of,  or, if the resale of such  Common  Stock by the  undersigned  is not
currently registered pursuant to an effective  registration  statement under the
Securities  Act of 1933, as amended,  by surrender of  securities  issued by the
Company  (including a portion of the Warrant) having a market value (in the case
of a portion of this Warrant, determined in accordance with Section 11(c) of the
Warrant) equal to $_________.  Please issue a certificate  or  certificates  for
such shares of Common  Stock in the name of and pay any cash for any  fractional
share to:



                                      Name:    ______________________________


                                      Signature:
                                      Address:____________________________
                                               _____________________________


                                      Note: The above signature should
                                            correspond exactly with the name
                                            on the face of the within Warrant,
                                            if applicable.


and,  if said  number  of shares of  Common  Stock  shall not be all the  shares
purchasable under the within Warrant,  a new Warrant is to be issued in the name
of said undersigned  covering the balance of the shares  purchasable  thereunder
less any fraction of a share paid in cash.


                               FORM OF ASSIGNMENT





     FOR VALUE RECEIVED,  the undersigned hereby sells,  assigns,  and transfers
all the rights of the undersigned under the within Warrant,  with respect to the
number of shares of Common Stock covered thereby set forth hereinbelow, to:


Name of Assignee                    Address                        No of Shares







,      and      hereby      irrevocably       constitutes      and      appoints
___________________________________  as agent and  attorney-in-fact  to transfer
said Warrant on the books of the  within-named  corporation,  with full power of
substitution in the premises.



Dated:   ________ __, 200_



In the presence of: ______________________________

                                      Name:______________________________


                                      Signature:_________________________
                                      Title of Signing Officer or Agent(if any):
                                                 ______________________________
                                      Address: ______________________________
                                               ______________________________

Note: The above signature should correspond exactly with the name on the face of
the within Warrant, if applicable.