E551 — Silicon dioxide · page 5

Status in the United States (FDA)

Listed in the FDA inventory “Substances Added to Food”, with the regulations 21 CFR 73.1, 73.575, 172.230, 172.480, 173.340, 182.90.

Technical effects listed by the FDA: anticaking agent or free-flow agent, antioxidant, color or coloring adjunct, drying agent, emulsifier or emulsifier salt, flavoring agent or adjuvant, formulation aid, humectant, lubricant or release 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 7631-86-9 via Wikidata (CC0)