21 CFR § 358.310 - Ingrown toenail relief active ingredient.

---
identifier: "/us/cfr/t21/s358.310"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 358.310 - Ingrown toenail relief active ingredient."
title_number: 21
title_name: "Food and Drugs"
section_number: "358.310"
section_name: "Ingrown toenail relief active ingredient."
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "D"
subchapter_name: "DRUGS FOR HUMAN USE"
part_number: "358"
part_name: "MISCELLANEOUS EXTERNAL DRUG PRODUCTS FOR OVER-THE-COUNTER HUMAN USE"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "21 U.S.C. 321, 351, 352, 353, 355, 360, 371."
regulatory_source: "55 FR 33255, Aug. 14, 1990, unless otherwise noted."
cfr_part: "358"
---


# 358.310 Ingrown toenail relief active ingredient.

The active ingredient of the product is sodium sulfide 1 percent in a gel vehicle. The gel vehicle is an aqueous, semisolid system with large organic molecules interpenetrated with a liquid.