US lawFederal (United States)RegulationsTitle 21 CFR — Food and DrugsChapter I — FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICESPart 573 — FOOD ADDITIVES PERMITTED IN FEED AND DRINKING WATER OF ANIMALSSubpart B — Food Additive Listing573.26021 C.F.R. § 573.260Calcium silicate.Last amended: 2016Year: 2026Length: 29 wordsOfficial source Cite as 21 C.F.R. § 573.260 (2026)Calcium silicate, including synthetic calcium silicate, may be safely used as an anticaking agent in animal feed, provided that the amount of calcium silicate does not exceed 2 percent.Previous21 C.F.R. § 573.240Next21 C.F.R. § 573.280