EXHIBIT 32.1


                                  EXHIBIT 32.1
                CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
                    AS ADOPTED PURSUANT TO SECTION 906 OF THE
                           SARBANES-OXLEY ACT OF 2002

In connection  with the  quarterly  report of Avitar,  Inc.  (the  "Company") on
Form10-QSB for the period ending March 31, 2005 as filed with the Securities and
Exchange  Commission on the date hereof (the  "Report"),  I, Peter P.  Phildius,
Chief Executive  Officer of the Company certify,  pursuant to 18 U.S.C.  Section
1350, as adopted pursuant to Section 906 of the  Sarbanes-Oxley  Act of 2002, to
my knowledge, that:

     (1) The Report  fully  complies  with the  requirements  of  Section  13(a)
or15(d) of the Securities Exchange Act of 1934; and

     (2)  The  information  contained  in the  Report  fairly  presents,  in all
material  respects,  the  financial  condition  and results of operations of the
Company.

Date: May 13, 2005

                                                 /s/ Peter P. Phildius
                                                 ---------------------
                                                 Peter P. Phildius Chief
                                                 Executive Officer