Sodium Ferrocyanide
This is what the ingredient is.
Sodium ferrocyanide (Yellow Prussiate of Soda) is an anticaking agent used in table salt and road salt.
Here is why it shows up on the label.
Prevents caking in table salt and other salt products. Very effective at low concentrations.
Here is what food agencies say.
The FDA has approved it at up to 13 ppm in salt. European food agencies allow it (E535) at specific limits. Permitted with restrictions.
Here is what research has found.
Despite containing cyanide group, ferrocyanide is very stable and does not release free cyanide under normal conditions.
Here are a few things worth knowing.
Safe at approved levels. The cyanide in ferrocyanide is tightly bound and not bioavailable. Avoid heating to extreme temperatures.
Sources
- FDA CFR 21
- EFSA Scientific Opinion
- JECFA Evaluation
How to read this page
We publish plain facts about this ingredient so a label is easier to read. This is not medical advice, and it is not a recommendation to buy, avoid, or use anything. For a personal health question, talk with a clinician who knows your history.