Filed Pursuant to Rule 424(b)(3)

                                                     REGISTRATION NO. 333-124794

                                   PROSPECTUS
                    ----------------------------------------

                                15,000,000 Shares

                                  AVITAR, INC.

                                  Common Stock
                          ----------------------------


     All of the shares of common stock offered in this Prospectus are being
offered by the selling security holders in transactions as described in the plan
of distribution. The Company will not receive any of the proceeds from the sales
(other than purchase prices received upon the exercise of currently outstanding
warrants, the underlying shares of which are being registered for sale
hereunder).

     Our common stock is traded on the American  Stock Exchange under the symbol
"AVR." On May 17,  2005,  the  closing  price  reported  on the  American  Stock
Exchange was $0.09 per share.

     THIS INVESTMENT IN THE COMMON STOCK INVOLVES A HIGH DEGREE OF
RISK. YOU SHOULD PURCHASE SHARES ONLY IF YOU CAN AFFORD A COMPLETE
LOSS.  SEE "RISK FACTORS" BEGINNING ON PAGE 3.

     Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities. They have not
determined if this Prospectus is truthful or complete. Any representation to the
contrary is a criminal offense.

                       ----------------------------------


                   The date of this Prospectus is May 20, 2005







                                TABLE OF CONTENTS
                                   PROSPECTUS

                                                                           Page


ABOUT AVITAR  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

RISK FACTORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

FORWARD-LOOKING STATEMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . 7

USE OF PROCEEDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

SELLING SECURITY HOLDERS. . . . . . . . . . . . . . . . . . . . . . . . . . . 8

PLAN OF DISTRIBUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

EXPERTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

LEGAL MATTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

STATEMENT OF INDEMNIFICATION . . . . . . . . . . . . . . . . . . . . . . . . 10

WHERE YOU CAN FIND MORE INFORMATION . . . . . . . . . . . . . . . . . . . . .11

INCORPORATION OF INFORMATION WE FILE WITH THE SEC . . . . . . . . . . . . . .11








                                  ABOUT AVITAR

     Avitar,   Inc.,   headquartered   in   Canton,   Massachusetts,   develops,
manufactures and markets  innovative  medical devices based on core technologies
in oral fluid diagnostics and customized polyurethane applications.  The Company
markets a unique portfolio of substance abuse testing products and services that
include:

- -    ORALscreen(R),   the  world's  first   point-of-contact  rapid  oral  fluid
     screening device for drugs of abuse,

- -    DRUGOMETER(TM),  an instrument  that  automates  the  analysis,  recording,
     reporting and transmitting of results for the ORALscreen(R)  drugs of abuse
     tests, and

- -    other  ORALscreen(R)-related  products and several other  specialized tests
     for drugs of abuse.

     Avitar also markets an oral fluid collection system for DNA testing as well
as a proprietary line of polyurethane-based high tech medical devices.

     The location of our  principal  executive  offices is 65 Dan Road,  Canton,
Massachusetts 02021; telephone: (781) 821-2440.


                                  RISK FACTORS

This offering involves a high degree of risk. You should carefully consider the
risks described below and the other information contained in this Prospectus
before deciding to invest in shares of our common stock.


THE COMPANY MAY NOT HAVE SUFFICIENT CASH FOR ITS CURRENT OPERATIONS AND IF IT IS
UNABLE TO RAISE NEW CAPITAL OR GENERATE SUFFICIENT CASH FROM OPERATIONS IT WILL
NOT BE ABLE TO FULFILL ITS FINANCIAL OBLIGATIONS.

The Company has a working capital deficit, which was approximately $390 thousand
at September 30, 2004 and approximately  $903 thousand at March 31, 2005. During
fiscal  year 2005,  the  Company's  cash  requirements  are  expected to include
primarily the funding of operating losses,  the payment of outstanding  accounts
payable,  the  repayment  of certain  notes  payable,  the funding of  operating
capital to grow the Company's drugs of abuse testing products and services,  and
the continued funding for the development of its ORALscreen(R) product line. The
Company  is  seeking  additional  capital  and  plans  to  raise  an  additional
$8,000,000  during  the  remainder  of  Fiscal  2005.  However,  there can be no
assurance  that these  financings  will be achieved.  If these  financings  were
achieved,   the  Company  would  be  able  to  fund  current   operations  until
profitability  or cash  flow  breakeven,  but only if its  projected  sales  are
achieved.  Thereafter  it will need  additional  funds for  operations,  product
expansion and debt repayment.

In the event of unforeseen circumstances affecting the economy and/or the
Company, this cash flow projection may be proven inaccurate, and the Company
will need additional funds for current operations as well as for its outstanding
obligations sooner than currently anticipated. The Company can give no assurance
that sources of funds will be available to fund its operations and other
obligations. If financing is unavailable, it may default on its obligations,
curtail operations or cease business altogether.


WE HAVE SUSTAINED LOSSES IN THE PAST AND WE EXPECT TO REPORT LOSSES IN THE
FUTURE; GOING CONCERN EXPLANATORY PARAGRAPH IN REPORT OF INDEPENDENT REGISTERED
PUBLIC ACCOUNTING FIRM.

We have incurred substantial losses that have reduced our stockholder's equity
and at times depleted our working capital. We funded our negative cash flows
from 1999 to date primarily by the sale of additional equity and the placement
of debt. We incurred losses of approximately $4.15 million during fiscal year
2002, $6.46 million during fiscal year 2003, $2.97 million during fiscal year
2004 and $1.82 million during the first half of fiscal year 2005.

The losses in fiscal year 2002 were incurred primarily from expenses associated
with the marketing of the new drug-testing kits and the development of test kits
for diseases. Economic conditions during fiscal year 2003 and 2004 and current
economic conditions have imposed significant constraints on capital raising and
have caused actual operating revenues to remain at a lower than expected level
during fiscal years 2003 and 2004 and the first half of fiscal year 2005.

As a result of the Company's recurring losses from operations and working
capital deficit, the report of its independent registered public accounting firm
relating to the financial statements for fiscal year 2004 contains an
explanatory paragraph stating substantial doubt about the Company's ability to
continue as a going concern. Such report states that the ultimate outcome of
this matter could not be determined as of the date of such report (December 8,
2004, except for Note 17 for which the date is December 17, 2004).


PRINCIPAL SUPPLIER RISK

Suppliers of two key components are, in each case, the current sole source for
the Company. The inability to obtain components will have an adverse effect on
the business, revenues and prospects of the Company. Although the Company has an
inventory of these components, it may not last sufficiently long while the
Company finds a new supplier. There is no assurance that a new supplier will be
found for these components on a timely basis, or at all, if the current supplier
ceases to sell to the Company.

Although some of the parts and components used to manufacture our products are
available from multiple sources, we currently purchase most of our components
from single sources in an effort to obtain volume discounts. Lack of
availability of any of these parts and components could result in production
delays, increased costs, or costly redesign of our products. Any loss of
availability of an essential system component could result in a material adverse
change to our business, financial condition and results of operations.


NO ASSURANCE FUTURE CAPITAL WILL BE AVAILABLE TO US; ADDITIONAL CAPITAL WILL
DILUTE THE HOLDINGS OF OUR STOCKHOLDERS.

If we need additional financing, we cannot give any assurance that it will be
available, or if available, that it will be available on terms favorable to our
stockholders. If funds are not available to satisfy any of our short-term and
long-term operating requirements, we may limit or suspend our operations in the
entirety or, under certain circumstances, seek protection from creditors. Our
recent equity offerings resulted in the dilution of our then existing
stockholders. It is possible that future financings may contain terms that could
result in similar or more substantial dilution than has already been incurred by
our stockholders from the sales of equity with warrants since fiscal year 1998.


A SIGNIFICANT NUMBER OF OUR SHARES ARE ELIGIBLE FOR SALE AND THEIR SALE COULD
FURTHER DEPRESS THE MARKET PRICE OF OUR STOCK.

Sales of substantial amounts of our common stock (including shares issued upon
exercise of outstanding options and warrants and shares issued upon conversion
of convertible preferred shares) in the public market could depress the market
price of our common stock. As of May 10, 2005, we had approximately 157
million shares outstanding and approximately 62 million shares committed or
reserved for issuance upon exercise of options and warrants or conversion of
convertible preferred shares.


RISK OF DELISTING FROM AMEX IF AVITAR FAILS TO REGAIN  COMPLIANCE WITH CONTINUED
LISTING STANDARDS

         Avitar does not meet all the continued listing standards of The
American Stock Exchange (AMEX) primarily because of its accumulated losses that
have reduced shareholders' equity to a deficit. AMEX has accepted Avitar's
Compliance Plan and granted an extension to July of 2005. However, Avitar is
subject to periodic review by AMEX and its shares could be delisted if Avitar
fails to regain compliance with the continued listing standards.


WE DEPEND ON THE DRUG OF ABUSE SCREEN SYSTEMS

We intend to continue to concentrate our efforts primarily on the development of
the ORALscreen(R) drug of abuse detection systems and we will be dependent upon
the successful development and marketing of those systems to generate revenues.
Acceptance of our systems may be adversely affected by:

     -    costs,
     -    concerns related to accuracy or false positive  reports,
     -    a cultural resistance to the use of drug of abuse screening tests,
     -    the effectiveness of competing drug of abuse screening tests.

Any failure to achieve greater market acceptance of our systems will have a
material adverse effect on our business, financial condition and results of
operations.


THE SUCCESS OF COMPETITIVE PRODUCTS COULD HAVE AN ADVERSE EFFECT ON OUR
BUSINESS.

The Drug of Abuse Testing industry is intensely competitive, although at present
we have encountered only minimal direct competition in the rapid on-site (as
opposed to laboratory) oral fluid drug testing market. The significant
competitive factors in the industry include:

     -    price,
     -    convenience,
     -    accuracy,
     -    acceptance of new technologies,
     -    user satisfaction, and
     -    when applicable, government approval.

We believe our ORALscreen(R) systems offer several distinct advantages over the
use of blood or urine samples, including net cost savings, ease of use and
non-invasiveness. However, the success of any competing alternative to the
ORALscreen(R) systems for screening for drugs of abuse could have a material
adverse effect on our business, financial condition and results of operations.
Most of our competitors have substantially greater financial capabilities for
product development and marketing than we currently do. These financial
capabilities enable our competitors to market their systems in a more effective
manner.


SUBSTANTIAL REGULATION BY GOVERNMENT AGENCIES.

Many of our products are subject to regulation by the Food and Drug
Administration (the "FDA") and comparable agencies in various states and foreign
countries requiring, among other things, pre-market approval or clearance of new
medical or dental devices. In November 2000, the FDA proposed regulations that,
although still not in effect, in the future may require a pre-market approval or
clearance of our ORALscreen(R) products for sale to employers. In addition,
Avitar is subject to inspections by the FDA at all times, and may be subject to
inspections by state and foreign agencies. If the FDA believes that its legal
requirements have not been fulfilled, it has extensive enforcement powers,
including the ability to initiate action to physically seize products and/or to
enjoin their manufacture and distribution, to require recalls of certain types
of products, and to impose or seek to impose civil or criminal sanctions against
individuals or companies. Such submissions and review by the FDA could take
several years, after which there could be no assurance that approval would be
granted.


DEPENDENCE ON INTELLECTUAL PROPERTY; NO ASSURANCE AS TO PROTECTION OF
INTELLECTUAL PROPERTY.

Our ability to compete effectively with other companies will depend, in part, on
our ability to maintain the proprietary nature of our technologies. We intend to
rely substantially on unpatented proprietary information and know-how, and there
can be no assurance that others will not develop such information and know-how
independently or otherwise obtain access to our technology. Similarly, there can
be no assurance that our proprietary technology will not infringe patents or
other rights owned by others. If we are unable to adequately safeguard and
exploit our methods and technologies, our ability to compete with other
companies, a majority of which have greater financial, technological, human and
other resources than the Company, our business would be materially adversely
affected.


RISK OF PRODUCT LIABILITY; LIMITED INSURANCE COVERAGE.

The testing, marketing and sale of medical and dental products entails a risk of
product liability claims by consumers and others. Avitar has maintained product
liability insurance coverage and currently has such insurance in the amount of
up to $5,000,000. This insurance will not cover liabilities caused by events
occurring after such policy is terminated or claims made after 60 days following
termination of the policy or in respect of events excluded from coverage. In the
event of a successful suit against Avitar, lack or insufficiency of insurance
coverage would have a material adverse effect on Avitar. Further, certain
distributors of medical and dental products require minimum product liability
insurance coverage as a condition precedent to purchasing or accepting products
for distribution. Failure to satisfy such insurance requirements could impede
the ability of Avitar to achieve broad distribution of its products, which would
have a material adverse effect on Avitar.


WE ARE DEPENDENT ON OUR MANAGEMENT AND KEY PERSONNEL TO SUCCEED.

Our principal executive officers and key personnel have extensive knowledge of
and experience with our products, the research and development efforts needed to
improve them and the development of marketing and sales programs to increase
their market penetration. The loss of the services of any of our executive
officers or other key personnel, or our failure to attract and retain other
skilled and experienced personnel, could have a material adverse effect on our
ability to manufacture, sell and market our products. Such events would probably
have a negative impact on our business and financial condition.


BARRIERS TO TAKEOVER

The Company is governed by the provisions of Section 203 of the Delaware General
Corporation Law, an anti-takeover law. In general, the law prohibits a public
Delaware corporation from engaging in a "business combination" with an
"interested stockholder" for a period of three years after the date of the
transaction in which the person became an interested stockholder, unless the
business combination is approved in a prescribed manner. "Business combination"
is defined to include mergers, asset sales and certain other transactions
resulting in a financial benefit to the stockholders. An "interested
stockholder" is defined as a person who, together with affiliates and
associates, owns (or within the prior three years, did own) 15% or more of a
corporation's voting stock. As a result of the application of Section 203,
potential acquirers of the Company may be discouraged from attempting to effect
an acquisition transaction with the Company, thereby possibly depriving holders
of the Company's securities of certain opportunities to sell or otherwise
dispose of such securities at above market prices pursuant to such transactions.
In addition, in the event of certain changes of control of the Company (as
defined in the Company's Equity Plan) outstanding options granted pursuant to
the Company's Equity Plan will become immediately exercisable in full. Such
acceleration of exercisability may also discourage potential acquirers of the
Company.


THE MARKET PRICE OF OUR STOCK HAS HISTORICALLY BEEN VOLATILE.

The volatility of our common stock imposes a greater risk of capital losses on
stockholders as compared to less volatile stocks. In addition, such volatility
makes it difficult to ascribe a stable valuation to a stockholder's holdings of
our common stock. Factors such as announcements of technological innovations,
changes in marketing, product pricing and sales strategies or new products by
our competitors, changes in domestic or foreign governmental regulations or
regulatory approval processes, developments or disputes relating to patent or
proprietary rights and public concern as to the reliability of the OralScreen
systems or drug tests in general may have a significant impact on the market
price of our common stock. Moreover, the possibility exists that the stock
market (and in particular the securities of technology companies such as ours)
could experience extreme price and volume fluctuations unrelated to operating
performance.


                           FORWARD-LOOKING STATEMENTS

Avitar, Inc. makes statements in this Prospectus and the documents incorporated
by reference that are considered forward-looking statements within the meaning
of the Securities Act of 1933 and the Securities Exchange Act of 1934. The
Private Securities Litigation Reform Act of 1995 contains the safe harbor
provisions that cover these forward-looking statements. We are including this
statement for purposes of complying with these safe harbor provisions. We base
these forward-looking statements on our current expectations and projections
about future events. These forward-looking statements are not guarantees of
future performance and are subject to risks, uncertainties and assumptions
including, among other things:

     -    continued losses and cash flow deficits;
     -    the continued  availability of financing in the amounts,  at the times
          and on the terms required to support our future business;
     -    uncertain market acceptance of our products;
     -    accuracy,  reliability and patent concerns  regarding our products and
          technology;
     -    competition; and
     -    reliance on key personnel.

Words such as "expect," "anticipate," "intend," "plan," "believe," "estimate"
and variations of such words and similar expressions are intended to identify
such forward-looking statements. We undertake no obligation to publicly update
or revise any forward-looking statements, whether as a result of new
information, future events or otherwise. Because of these risks, uncertainties
and assumptions, the forward-looking events discussed or incorporated by
reference in this document may not occur.

                                 USE OF PROCEEDS

     We will not receive any proceeds from the sale of shares of common stock by
the selling security holders.



                            SELLING SECURITY HOLDERS

     The shares of common stock offered herein include 11,718,750 shares
reserved for issuance on conversion of $750,000 Series E Convertible Preferred
Stock based upon current market conversion prices; 75,000 shares that may be
issued on exercise of outstanding warrants; 1,171,875 shares ("Interest Shares")
reserved for possible issuance on conversion of $75,000 Series E Convertible
Preferred Stock that may be issued for interest accruing at 5% over the possible
two year term of the $750,000 Series E Convertible Preferred Stock (again based
upon current market conversion prices), and another 2,034,375 shares
("Additional Conversion Shares") reserved for issuance on conversion of Series E
Convertible Preferred Stock based upon possible reduction of future market
conversion prices.

     Absent registration under the Securities Act, the shares of common stock
offered herein are subject to certain limitations on resale. The Registration
Statement of which this Prospectus forms a part has been filed in satisfaction
of certain registration rights we granted to the entities listed below. The
following table assumes that the entities listed below will sell all of the
common stock offered herein set forth opposite their respective names. However,
the entities listed below may sell only a portion or may sell none of the shares
set forth opposite their names.

     In the information immediately following this table and footnotes, we
describe each selling shareholder's relationship to the Company and how each
selling shareholder acquired the shares to be sold in this offering.




                              Common Shares                                          Common Shares
                              Beneficially Owned                                    Beneficially Owned
                              Prior to the                     Number of            After the Offering
                              Offering (1)                    Shares to
                             ______________________            be Sold             ________________________
                             Number        Percent              in the              Number of      Percent
                            of Shares      of Class            Offering             Shares         of Class
                            --------       --------             ---------          -------           --------
                                                                        
Cornell Capital
 Partners, L.P.            10,628,700 (2)    4.99%            11,793,750 (3)        989,673 (4)          * %


Dividend (5%) Shares                0           0%             1,171,875 (5)              0              * %

Additional
Conversion Shares                   0           0%             2,034,375 (6)              0
- -------------------------------------------------------------------------------------------------------------
Grand Total                10,628,700        4.99%            15,000,000            989,673              * %


- -----------------
(1) Shares beneficially held as of April 30, 2005 to the knowledge of the
Company.

(2) Includes (a)  11,718,750  shares  underlying  $750,000  Series E Convertible
Preferred Stock (based upon current market  conversion  prices) and (b) warrants
to purchase  75,000  shares,  but limited to 4.99% as  discussed  below.  Avitar
committed  to issue  the  $750,000  Series E  Convertible  Preferred  Stock  and
warrants to purchase 75,000 shares to Cornell Capital Partners, L.P. pursuant to
a Securities Purchase Agreement delivered on April 19, 2005 as part of a private
placement in exchange  for total gross  proceeds of $750,000  ($375,000  paid on
April 19,  2005 and  $375,000  paid on May 9,  2005).  The Series E  Convertible
Preferred  Stock are  convertible  into common  stock at the lesser of $0.08 per
share and 80% of the average of the three (3) lowest  closing bid prices for the
ten (10) trading days immediately prior to the notice of conversion,  subject to
adjustments and automatically  convert on the second anniversary date, April 19,
2007,  together  with  dividends at 5% per annum that may be paid by issuance of
stock ; but all limited to  issuance of shares of no more than 4.99%  beneficial
ownership pursuant to the Securities  Purchase Agreement between the Company and
Cornell Capital Partners, L.P.


(3) Includes (a) 11,718,750 shares underlying $750,000 shares of Series E
Convertible Preferred Stock (based upon current market conversion prices)
convertible into common stock at the lesser of $0.08 per share and 80% of the
average of the three (3) lowest closing bid prices for the ten (10) trading days
immediately prior to the notice of conversion, and (b) 75,000 warrants. The
warrants are exercisable at $0.084 per share.

(4) Shares of common stock issued to Cornell Capital Partners, L.P. as fees in
connection with a Standby Equity Distribution Agreement ("SEDA") entered into
with the Company as of February 1, 2005, but terminated on April 19, 2005. As
discussed in more detail below, these shares would be returned to the Company
under certain circumstances, but would be retained by Cornell Capital Partners,
L.P. if a new SEDA on identical terms were entered into within a specified 90
day period.

(5) "Dividend Shares" reserved for possible issuance on conversion of $75,000
shares of Series E Convertible Preferred Stock that may be issued for dividends
accruing at 5% over the possible two year term of the $750,000 Series E
Convertible Preferred Stock (again based upon current market conversion prices).

(6) "Additional Conversion Shares" reserved for issuance on conversion of Series
E Convertible Preferred Stock based upon possible reduction of future market
conversion prices.

 * Less than one percent (1%).


 Description of Relationship of Cornell Capital Partners, L.P. with Avitar

The following information concerns (i) each selling shareholder's relationship
to Avitar and (ii) how each selling shareholder acquired the shares to be sold
in this offering. None of the selling shareholders have held a position or
office, or had any other material relationship, with the Company, except as
follows:

SHARES ACQUIRED IN FINANCING TRANSACTIONS WITH AVITAR

- -    CORNELL CAPITAL PARTNERS,  LP. Cornell Capital Partners, LP is the investor
     under  the  Securities  Purchase  Agreement  and a holder  of the  Series E
     Convertible Preferred Stock and related Warrants.  Yorkville Advisors,  LLC
     is the general partner of Cornell  Capital  Partners.  As general  partner,
     Yorkville  Advisors,  LLC controls and makes all  investment  decisions for
     Cornell  Capital  Partners.  Mark Angelo,  the managing member of Yorkville
     Advisors,  makes  the  investment  decisions  on  behalf  of  and  controls
     Yorkville  Advisors.  Cornell  Capital  Partners  acquired all shares being
     registered in this offering in financing  transactions  with Avitar.  Those
     transactions are explained below:

- -    SECURITIES  PURCHASE  AGREEMENT.  On April  19,  2005,  we  entered  into a
     Securities  Purchase  Agreement with Cornell Capital Partners.  Pursuant to
     the  Securities  Purchase  Agreement,  we issued  $750,000 of the Company's
     Series E Convertible Preferred Stock and Warrants to purchase 75,000 shares
     of the Company's  common stock in exchange for gross  proceeds of $750,000,
     of which  $375,000  was paid in the first  closing and a second  tranche of
     $375,000  was  paid on May 9,  2005.  The  $750,000  Series  E  Convertible
     Preferred  Stock are  convertible  into common stock at the lesser of $0.08
     per share or 80% of the average of the three (3) lowest  closing bid prices
     for  the  ten  (10)  trading  days  immediately  prior  to  the  notice  of
     conversion,  subject to adjustments and  limitations,  and the Warrants are
     exercisable at $0.084 per share.

    The Series E Convertible Preferred Stock has a potential two-year term
accruing dividends at 5% per year until automatic conversion on its second
anniversary date, April 19, 2007. If Cornell Capital Partners chooses to have
interest be payable in common stock of the Company, rather than cash, this could
have a further dilutive impact on our stockholders and could cause our stock
price to decline. At maturity, the Series E Convertible Preferred Stock will
automatically convert into shares of common stock at the then market conversion
price. We are registering 11,718,750 shares of common stock under this
prospectus based on current market conversion prices under the Series E
Convertible Preferred Stock and 2,034,375 Additional Conversion Shares for
possible reductions of future market conversion prices and 1,171,875 Dividend
Shares that may be issued in lieu of cash for accrued dividends.

    On April 19, 2005, prior to entering into the Securities Purchase Agreement
referred to above, the parties entered into a Termination Agreement terminating
a Standby Equity Distribution Agreement ("SEDA") and related agreements made as
of February 1, 2005. If Cornell Capital Partners does not enter into a SEDA on
identical terms within 90 days after all amounts payable under the Securities
Purchase Agreement are satisfied, Cornell Capital Partners agreed to return to
Avitar all fees received pursuant to the February 2005 SEDA.

  There are certain risks related to sales by Cornell Capital Partners, L.P.
("Cornell") including:

     >    The shares will be issued based on a discount to market  prices.  As a
          result,  the lower the stock price  around the time  Cornell is issued
          shares,  the greater  chance that Cornell  receives more shares.  This
          could result in substantial dilution to the interests of other holders
          of common stock.

     >    To the extent  Cornell sells its common stock,  the common stock price
          may decrease due to the  additional  shares in the market.  This could
          allow Cornell to sell greater  amounts of common  stock,  the sales of
          which would further depress the stock price.

     >    The significant  downward pressure on the price of the common stock as
          Cornell sells material  amounts of common stock could  encourage short
          sales by third parties.  This could place further downward pressure on
          the price of the common stock.


                              PLAN OF DISTRIBUTION

                  We are registering the common stock, including the common
stock underlying the warrants and the shares of preferred stock on behalf of the
selling stockholders. The common stock may be sold in one or more transactions
at fixed prices, at prevailing market prices at the time of sale, at prices
related to the prevailing market prices, at varying prices determined at the
time of sale, or at negotiated prices. These sales may be effected at various
times in one or more of the following transactions, or in other kinds of
transactions:

     -    transactions  on  The  American  Stock  Exchange  or on  any  national
          securities  exchange  or  U.S.  inter-dealer  system  of a  registered
          national  securities  association  on which  the  common  stock may be
          listed or quoted at the time of sale;

     -    in the over-the-counter market;

     -    in  private  transactions  and  transactions  otherwise  than on these
          exchanges or systems or in the over-the-counter market;

     -    in connection with short sales of the shares;

     -    by pledge to secure or in payment of debt and other obligations;

     -    through the  writing of options,  whether the options are listed on an
          options exchange or otherwise;

     -    in connection with the writing of non-traded and exchange-traded  call
          options, in hedge transactions and in settlement of other transactions
          in standardized or over-the-counter options; or

     -    through a combination of any of the above transactions.

     The selling stockholders and their successors, including their transferees,
pledgees or donees or their  successors,  may sell the common stock  directly to
the  purchasers  or through  underwriters,  broker-dealers  or  agents,  who may
receive  compensation in the form of discounts,  concessions or commissions from
the selling  stockholders or the  purchasers.  These  discounts,  concessions or
commissions as to any particular  underwriter,  broker-dealer or agent may be in
excess of those customary in the types of transactions involved.

     In addition,  any securities  covered by this  prospectus  that qualify for
sale pursuant to Rule 144 under the  Securities Act may be sold pursuant to Rule
144 rather than pursuant to this prospectus.

     We entered  into  registration  rights  agreements  for the  benefit of the
selling  stockholders to register the common stock under applicable  federal and
state  securities  laws.  The  registration   rights   agreements   provide  for
cross-indemnification  of the  selling  stockholders  and us and our  respective
directors,  officers and  controlling  persons against  specific  liabilities in
connection  with the offer and sale of the common stock,  including  liabilities
under the Securities Act. We will pay substantially all of the expenses incurred
by the selling  stockholders  incident to the  registration  of the offering and
sale of the common stock.

     The selling stockholders and any other persons participating in the sale or
distribution  of the  shares  will be subject to  applicable  provisions  of the
Exchange Act and the rules and regulations  under such act,  including,  without
limitation,  Regulation M. These provisions may restrict certain  activities of,
and limit the timing of purchase  and sales of any of the shares by, the selling
stockholders or any other such person. Furthermore,  under Regulation M, persons
engaged in a  distribution  of securities  are  prohibited  from  simultaneously
engaging in market  making and certain  other  activities  with  respect to such
securities  for a  specified  period of time prior to the  commencement  of such
distributions,  subject to  specified  exceptions  or  exemptions.  All of these
limitations may affect the marketability of the shares.

                                     EXPERTS

     The financial  statements  incorporated  by reference in this  Registration
Statement  have been  audited by BDO  Seidman,  LLP, an  independent  registered
public  accounting  firm,  to the extent and for the  periods set forth in their
report (which contains an explanatory paragraph regarding the Company's ablility
to  continue  as a going  concern)  incorporated  herein by  reference,  and are
incorporated  herein in reliance  upon such report  given upon the  authority of
said firm as experts in auditing and accounting.

                                  LEGAL MATTERS

     Certain legal matters with respect to the validity of the common stock will
be passed upon for Avitar by Dolgenos Newman & Cronin LLP, New York, New York.


                          STATEMENT OF INDEMNIFICATION

     The Company's  Certificate of  Incorporation,  as amended,  provides that a
director will not be personally  liable to the Company or its  stockholders  for
monetary  damages  for  the  breach  of his or her  fiduciary  duty of care as a
director,  including breaches that constitute gross negligence. By its terms and
in accordance with the Delaware General Corporation Law ("DGCL"),  however, this
provision does not eliminate or limit the liability of a director of the Company
(i)  for  breach  of the  director's  duty  of  loyalty  to the  Company  or its
stockholders,  (ii) for acts or  omissions  not in good  faith or which  involve
intentional misconduct or a knowing violation of law, (iii) under Section 174 of
the  DGCL  (relating  to  unlawful  payments  of  dividends  or  unlawful  stock
repurchases or redemptions) or (iv) for any improper benefit.

     This  provision  offers  persons  who  serve  on  our  board  of  directors
protection  against awards of monetary damages  resulting from breaches of their
duty of care (except as indicated  above).  As a result of this  provision,  our
ability or our stockholder's ability to successfully prosecute an action against
a director for a breach of his duty of care is limited.  However,  the provision
does not affect the availability of equitable  remedies such as an injunction or
rescission based upon a director's breach of his duty of care. The SEC has taken
the position  that the  provision  will have no effect on claims  arising  under
federal securities laws.

     Section 145 of the Delaware law grants  corporations the right to indemnify
their  directors,   officers,  employees  and  agents  in  accordance  with  the
provisions  therein set forth.  Our By-laws  provide  that we shall,  subject to
limited  exceptions,  indemnify  our  directors  and  executive  officers to the
fullest extent not prohibited by the Delaware law. Our By-laws  provide  further
that we shall have the power to  indemnify  our other  officers,  employees  and
other  agents as set forth in the  Delaware  law.  Such  indemnification  rights
include reimbursement for expenses incurred by such director, executive officer,
other  officer,  employee or agent in advance of the final  disposition  of such
proceeding in accordance with the applicable provisions of the Delaware law.

     We have entered into  agreements with certain of our directors and officers
pursuant to which we have agreed to indemnify such directors and officers to the
fullest extent  permitted under  applicable law. In addition,  we have purchased
insurance  containing  customary  terms and  conditions  as  permitted by law on
behalf of our  directors  and officers,  which may cover  liabilities  under the
Securities Act.  Insofar as  indemnification  for liabilities  arising under the
Securities  Act may be permitted  to our  directors,  officers  and  controlling
persons  pursuant to these  provisions,  or  otherwise,  Avitar has been advised
that, in the opinion of the SEC, such  indemnification  is against public policy
as expressed in the Securities Act and is, therefore, unenforceable.

                       WHERE YOU CAN FIND MORE INFORMATION

     We file reports, proxy statements and other information with the Securities
and Exchange Commission. Our SEC filings are also available over the Internet at
the  SEC's  web  site at  http://www.sec.gov.  You may  also  read  and copy any
document we file at the SEC's public  reference  rooms in Washington,  D.C., New
York, New York and Chicago,  Illinois. Please call the SEC at 1-800-SEC-0330 for
more information on the public reference rooms.

     Statements made in this Prospectus  concerning the contents of any contract
or other documents are not necessarily  complete.  With respect to each contract
or other document filed as an appendix to the Registration Statement,  reference
is hereby made to that  appendix for a more complete  description  of the matter
involved,  and each such  statement is hereby  qualified in its entirety by such
reference.

                INCORPORATION OF INFORMATION WE FILE WITH THE SEC

     The SEC allows us to  "incorporate  by reference"  the  information we file
with them,  which means: .  incorporated  documents are  considered  part of the
Prospectus;

     .    we can disclose important information to you by referring you to those
          documents; and

     .    information  that we file with the SEC will  automatically  update and
          supersede the Prospectus.

We are incorporating by reference the documents listed below which were filed
with the SEC under the Exchange Act:

     o    Annual  Report on Form  10-KSB/A-2  for the year ended  September  30,
          2004, and documents incorporated by reference in such report; and

     o    Quarterly Report on Form 10-QSB/A-1 for the quarter ended December 31,
          2004; and

     o    Quarterly Report on Form 10-QSB/A-1 for the quarter ended March 31,
          2005; and

     o    Current  Report on Form 8-K dated  February 1, 2005  reporting on Item
          1.01 Entry into a Material Definitive Agreement; and

     o    Current Report on Form 8-K dated April 19, 2005 reporting on Item 1.01
          Entry into a Material Definitive Agreement; Item 1.02 Termination of a
          Material  Definitive  Agreement,  and Item 3.02 Unregistered  Sales of
          Equity Securities.

We also incorporate by reference each of the following documents that we will
file with the SEC after the date of the Prospectus but before the end of the
offering:

     .    Reports filed under Sections 13(a) and (c) of the Exchange Act;

     .    Definitive  proxy or information  statements filed under Section 14 of
          the  Exchange  Act in  connection  with any  subsequent  stockholders'
          meeting; and

     .    Any reports filed under Section 15(d) of the Exchange Act.

You may request a copy of these filings, at no cost, by contacting us at the
following address or phone number:

                             Avitar, Inc.
                             Attn:  Mr. Jay Leatherman
                             Chief Financial Officer
                             65 Dan Road
                             Canton, MA 02021
                             Telephone:(781) 821-2440







                  You should rely only on the information incorporated by
reference or provided in this Prospectus or any supplement. We have not
authorized anyone else to provide you with different information. The selling
securityholders will not make an offer of these shares in any state where the
offer is not permitted. You should not assume that the information in this
Prospectus or any supplement is accurate as of any date other than the date on
the front of these documents.
=====================================================================
We have not authorized any dealer, salesperson or other person to give any
information or represent anything not contained in this Prospectus. You must not
rely on any unauthorized information. If anyone provides you with different or
inconsistent information, you should not rely on it. This Prospectus does not
offer to sell any shares in any jurisdiction where it is unlawful. The
information in this Prospectus is current as of the date shown on the cover
page.


                                15,000,000 Shares


                                  AVITAR, INC.


                                  Common Stock
                              --------------------


                                   Prospectus

                              --------------------



                                  May 20, 2005
     =====================================================================