Sodium Ferrocyanide
Also known as: E535, Yellow prussiate of soda
Sodium ferrocyanide is authorized in the EU as E535 with an ADI of 0.03 mg/kg bw/day (as ferrocyanide ion). The cyanide is tightly bound and not bioavailable as free cyanide.
What it is
Sodium ferrocyanide (Na4[Fe(CN)6]), a coordination compound used as anticaking agent.
Anticaking agent in salt and salt substitutes.
What regulators actually say
"Yellow prussiate of soda (sodium ferrocyanide) may be safely used... in salt as an anticaking agent in an amount not in excess of 13 parts per million."
"EFSA established an ADI of 0.03 mg/kg bw/day for ferrocyanides (E 535-538)."
Regulatory status
United States — FDA
Sodium ferrocyanide is not GRAS-listed; potassium ferrocyanide is permitted as anticaking in salt under 21 CFR 172.490 (max 13 ppm)
European Union — EFSA
Authorized food additive E535 in EU at limited levels (max ~20 mg/kg in salt)
Scan it before you buy it
Get Ube on iOS or Android — point at any barcode, see what's actually in there.
Get the app