21 C.F.R. § 181.23
Substances classified as antimycotics, when migrating from food-packaging material shall include:
Calcium propionate. Methylparaben (methyl p-hydroxybenzoate). Propylparaben (propyl p-hydroxybenzoate). Sodium benzoate. Sodium propionate. Sorbic acid.
[42 FR 14638, Mar. 15, 1977; 42 FR 56728, Oct. 28, 1977]