E224 — Potassium metabisulfite
E224 (Potassium metabisulfite) appears in the ingredient lists of 416 products sold in the United States. Function: antioxidant, preservative.
Nutri-Score
310 rated products
Median values
| Calories | 68 kcal |
| Sugars | 2.4 g |
| Saturated fat | 0.00 g |
| Salt | 0.40 g |
Categories
Status in the United States (FDA)
Listed in the FDA inventory “Substances Added to Food”, with the regulations 21 CFR 182.3637.
Technical effects listed by the FDA: antimicrobial agent, antioxidant, color or coloring adjunct, dough strengthener, flour treating agent, oxidizing or reducing agent
The inventory is a partial list, and a listing is not an FDA approval of every use; the regulations set the permitted uses.
U.S. Food and Drug Administration, Substances Added to Food (updated 9/8/2026), public domain · CAS 16731-55-8 via Wikidata (CC0)
Products containing it, by country
Products listing this additive in each country edition of Shelfpedia (Open Food Facts data)
Products
416 products, most viewed first · page 1 of 9.
Source: Open Food Facts export of 23 October 2026, ODbL, and USDA FoodData Central, April 2026 release, CC0 · Shelfpedia calculations (medians, distributions).