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Regulations last checked for updates: May 14, 2025
Title 21 - Food and Drugs last revised: May 12, 2025
All Titles
Title 21
Chapter I
Part 500
Subpart B - Subpart B—Specific Administrative Rulings and Decisions
§ 500.23 - Thermally processed low-acid foods packaged in hermetically sealed containers.
§ 500.24 - Emergency permit control.
§ 500.25 - Anthelmintic drugs for use in animals.
§ 500.26 - Timed-release dosage form drugs.
§ 500.27 - Methylene blue-containing drugs for use in animals.
§ 500.29 - Gentian violet for use in animal feed.
§ 500.30 - Gentian violet for animal drug use.
§ 500.45 - Use of polychlorinated biphenyls (PCB's) in the production, handling, and storage of animal feed.
§ 500.46 - Hexachlorophene in animal drugs.
§ 500.50 - Propylene glycol in or on cat food.
authority:
21 U.S.C. 321
,
331
,
342
,
343
,
348
,
351
,
352
,
353
,
360b
,
371
,
379e
source:
40 FR 13802, Mar. 27, 1975, unless otherwise noted.
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