U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 28, 2025

All TitlesTitle 21Chapter IPart 181Subpart B - Subpart B—Specific Prior-Sanctioned Food Ingredients
View all text of Subpart B [§ 181.22 - § 181.34]
§ 181.24 - Antioxidants.

Substances classified as antioxidants, when migrating from food-packaging material (limit of addition to food, 0.005 percent) shall include:

Butylated hydroxyanisole. Butylated hydroxytoluene. Dilauryl thiodipropionate. Distearyl thiodipropionate. Gum guaiac. Nordihydroguairetic acid. Propyl gallate. Thiodipropionic acid. 2,4,5-Trihydroxy butyrophenone. [42 FR 14638, Mar. 15, 1977; 42 FR 56728, Oct. 28, 1977]
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