CFR › Title 21 › Part 346 › §346.2021 CFR §346.20Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkThe active ingredient of the product consists of any of the following when used within the concentration range established for each ingredient:(a)Alcloxa 0.2 to 2 percent.(b)Resorcinol 1 to 3 percent.