Exhibit 23.1

HANSEN, BARNETT & MAXWELL, P.C. A Professional Corporation CERTIFIED PUBLIC ACCOUNTANTS 5 Triad Center, Suite 750 Salt Lake City, UT 84180-1128 Phone: (801) 532-2200 Fax: (801) 532-7944 www.hbmcpas.com

Registered with the Public Company Accounting Oversight Board

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors

International Isotopes, Inc.

We consent to the use of our report dated March 31, 2010 with respect to the financial statements of International Isotopes, Inc. included in this annual report on Form 10-K filed on March 30, 2010 with the Securities Exchange Commission, and incorporated by reference in the Registration statements on Form S-8 (No. 333-121335, No. 333-108776, and 333-158575), and Form S-3 (No. 333-106215 and No. 333-142674).

HANSEN, BARNETT & MAXWELL, P.C.

Salt Lake City, Utah
March 31, 2010