StacksVerified U.S. regulatory reference

21 CFR §333.310

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The active ingredient of the product consists of any of the following:
  1. (a)Benzoyl peroxide, 2.5 to 10 percent.
  2. (b)Resorcinol, 2 percent, when combined with sulfur in accordance with § 333.320(a).
  3. (c)Resorcinol monoacetate, 3 percent, when combined with sulfur in accordance with § 333.320(b).
  4. (d)Salicylic acid, 0.5 to 2 percent.
  5. (e)Sulfur, 3 to 10 percent.
  6. (f)Sulfur, 3 to 8 percent, when combined with resorcinol or resorcinol monoacetate in accordance with § 333.320.