21 CFR § 582.3637 - Potassium metabisulfite.

---
identifier: "/us/cfr/t21/s582.3637"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 582.3637 - Potassium metabisulfite."
title_number: 21
title_name: "Food and Drugs"
section_number: "582.3637"
section_name: "Potassium metabisulfite."
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "E"
subchapter_name: "ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS"
part_number: "582"
part_name: "SUBSTANCES GENERALLY RECOGNIZED AS SAFE"
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: "41 FR 38657, Sept. 10, 1976, unless otherwise noted."
cfr_part: "582"
---


# 582.3637 Potassium metabisulfite.

(a) *Product.* Potassium metabisulfite.

(b) [Reserved]

(c) *Limitations, restrictions, or explanation.* This substance is generally recognized as safe when used in accordance with good manufacturing or feeding practice, except that it is not used in meats or in food recognized as source of vitamin B<sub>1</sub>.