Yellow prussiate of soda.
21 C.F.R. § 573.1020
in effectEffective: 2024-07-01Yellow prussiate of soda (sodium ferrocyanide decahydrate: Na4Fe(Cn)6°-10H2O) may be safely used as an anticaking agent in salt for animal consumption at a level not to exceed 13 parts per million. The additive contains a minimum of 99.0 percent by weight of sodium ferrocyanide decahydrate.
Source: eCFRURL: https://www.ecfr.gov/api/versioner/v1/full/2024-07-01/title-21.xmlFetched: 7/26/2026