part_subject: "TOPICAL ANTIMICROBIAL DRUG PRODUCTS FOR OVER-THE-COUNTER HUMAN USE"
subpart_code: "C"
subpart_subject: "Topical Antifungal Drug Products"
section_number: "333.210"
section_subject: "Antifungal active ingredients."
cfr_reference: "21 CFR 333.210"
title_name: "Title 21"
title_subject: "Food and Drugs"
parts_covered: "Parts 300 to 499"
revised_date: "Revised as of April 1, 2019"
publication_date: "As of April 1, 2019"
contains_description: "Containing a codification of documents of general applicability and future effect"
publication_info: "Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"
---
The active ingredient of the product consists of any one of the following within the specified concentration established for each ingredient:
(f)Undecylenic acid, calcium undecylenate, copper undecylenate, and zinc undecylenate may be used individually or in any ratio that provides a total undecylenate concentration of 10 to 25 percent.