[Code of Federal Regulations] [Title 21, Volume 3] [Revised as of April 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR173.135] [Page 122] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 173--SECONDARY DIRECT FOOD ADDITIVES PERMITTED IN FOOD FOR HUMAN CONSUMPTION--Table of Contents Subpart B--Enzyme Preparations and Microorganisms Sec. 173.135 Catalase derived from Micrococcus lysodeikticus. Bacterial catalase derived from Micrococcus lysodeikticus by a pure culture fermentation process may be safely used in destroying and removing hydrogen peroxide used in the manufacture of cheese, in accordance with the following conditions. (a) The organism Micrococcus lysodeikticus from which the bacterial catalase is to be derived is demonstrated to be nontoxic and nonpathogenic. (b) The organism Micrococcus lysodeikticus is removed from the bacterial catalase prior to use of the bacterial catalase. (c) The bacterial catalase is used in an amount not in excess of the minimum required to produce its intended effect.