E221 — Sodium sulfite
E221 (Sodium sulfite) appears in the ingredient lists of 543 products sold in the United States. Function: antioxidant, preservative.
Nutri-Score
491 rated products
Median values
| Calories | 448 kcal |
| Sugars | 9.7 g |
| Saturated fat | 1.8 g |
| Salt | 1.2 g |
Categories
Status in the United States (FDA)
Listed in the FDA inventory “Substances Added to Food”, with the regulations 21 CFR 73.85, 173.310, 182.3798.
Technical effects listed by the FDA: antioxidant, color or coloring adjunct, dough strengthener, flour treating agent, formulation aid, oxidizing or reducing agent, ph control 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 7757-83-7 via Wikidata (CC0)
Products
543 products, most viewed first · page 1 of 12.
Source: Open Food Facts export of 23 October 2026, ODbL, and USDA FoodData Central, April 2026 release, CC0 · Shelfpedia calculations (medians, distributions).