21 C.F.R. § 333.310 Acne active ingredients.
Title 21 - Food and Drugs
The active ingredient of the product consists of any of the following when labeled according to §333.350. (a) Resorcinol 2 percent when combined in accordance with §333.320(a). (b) Resorcinol monoacetate 3 percent when combined in accordance with §333.320(b). (c) Salicylic acid 0.5 to 2 percent. (d) Sulfur 3 to 10 percent. (e) Sulfur 3 to 8 percent when combined in accordance with §333.320.
Title 21: Food and Drugs
PART 333—TOPICAL ANTIMICROBIAL DRUG PRODUCTS FOR OVER-THE-COUNTER HUMAN USE
Subpart D—Topical Acne Drug Products
§ 333.310 Acne active ingredients.
