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, 2006 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 15, 2006

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