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Title 21

Displaying title 21, up to date as of 7/16/2026. Title 21 was last amended 7/09/2026.
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Title 21Food and DrugsPart / Section
Chapter IFood and Drug Administration, Department of Health and Human Services1 – 1299
Subchapter BFood for Human Consumption100 – 199
Part 173Secondary Direct Food Additives Permitted in Food for Human Consumption173.5 – 173.405
Subpart APolymer Substances and Polymer Adjuvants for Food Treatment173.5 – 173.75
Subpart BEnzyme Preparations and Microorganisms173.110 – 173.170
§ 173.110Amyloglucosidase derived from Rhizopus niveus.
§ 173.115Alpha-acetolactate decarboxylase (α-ALDC) enzyme preparation derived from a recombinant Bacillus subtilis.
§ 173.120Carbohydrase and cellulase derived from Aspergillus niger.
§ 173.130Carbohydrase derived from Rhizopus oryzae.
§ 173.135Catalase derived from Micrococcus lysodeikticus.
§ 173.140Esterase-lipase derived from Mucor miehei.
§ 173.145Alpha-Galactosidase derived from Mortierella vinaceae var. raffinoseutilizer.
§ 173.150Milk-clotting enzymes, microbial.
§ 173.160Candida guilliermondii.
§ 173.165Candida lipolytica.
§ 173.170Aminoglycoside 3′-phosphotransferase II.
Subpart CSolvents, Lubricants, Release Agents and Related Substances173.210 – 173.290
Subpart DSpecific Usage Additives173.300 – 173.405