21 CFR § 181.24 - Antioxidants.

---
identifier: "/us/cfr/t21/s181.24"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 181.24 - Antioxidants."
title_number: 21
title_name: "Food and Drugs"
section_number: "181.24"
section_name: "Antioxidants."
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "B"
subchapter_name: "FOOD FOR HUMAN CONSUMPTION"
part_number: "181"
part_name: "PRIOR-SANCTIONED FOOD INGREDIENTS"
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, 342, 348, 371."
regulatory_source: "42 FR 14638, Mar. 15, 1977, unless otherwise noted."
cfr_part: "181"
---


# 181.24 Antioxidants.

Substances classified as antioxidants, when migrating from food-packaging material (limit of addition to food, 0.005 percent) shall include:

Butylated hydroxyanisole.

Butylated hydroxytoluene.

Dilauryl thiodipropionate.

Distearyl thiodipropionate.

Gum guaiac.

Nordihydroguairetic acid.

Propyl gallate.

Thiodipropionic acid.

2,4,5-Trihydroxy butyrophenone.

[42 FR 14638, Mar. 15, 1977; 42 FR 56728, Oct. 28, 1977]