Iris International (IRIS) 10-K 2011 FY Annual report

Exhibit 32.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

PURSUANT TO RULE 13A-14(B) OF THE EXCHANGE ACT AND 18 U.S.C. SECTION 1350 AS

ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Cesar M. Garcia, certify, pursuant to Rule 13a-14(b) and 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Annual Report of IRIS International, Inc. on Form 10-K for the year ended December 31, 2011 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Annual Report on Form 10-K fairly presents, in all material respects, the financial condition and results of operations of IRIS International, Inc.

Date: March 12, 2012	/s/ César M. García
	César M. García Chief Executive Officer