Acne active ingredients.
21 C.F.R. § 333.310
in effectEffective: 2024-07-01The active ingredient of the product consists of any of the following:
(a) Benzoyl peroxide, 2.5 to 10 percent.
(b) Resorcinol, 2 percent, when combined with sulfur in accordance with § 333.320(a).
(c) Resorcinol monoacetate, 3 percent, when combined with sulfur in accordance with § 333.320(b).
(d) Salicylic acid, 0.5 to 2 percent.
(e) Sulfur, 3 to 10 percent.
(f) Sulfur, 3 to 8 percent, when combined with resorcinol or resorcinol monoacetate in accordance with § 333.320.
Source: eCFRURL: https://www.ecfr.gov/api/versioner/v1/full/2024-07-01/title-21.xmlFetched: 7/26/2026