Potassium ferrocyanide is the additive the food industry lists as E536. In our table it is no risk identified: it takes no points off a product's score.
- The key finding, from EFSA: Group ADI 0.03 mg ferrocyanide ion/kg bw/day; refined exposure ~0.003 mg/kg bw/day in children and adolescents; no safety concern at authorised uses (salt and salt substitutes only) (EFSA Journal 2018;16(7):5374, doi:10.2903/j.efsa.2018.5374)
- No child flag. The class, and the points it costs, are the same for a child of any age.
- Where you meet it. It turns up in 3 of the 10,000 packaged foods scanned most on Open Food Facts, most often in sauces. Nine in ten of those foods are sold in Europe (counted 26 Sep 2026).
- 1 citation from EFSA, each one below.
What Potassium ferrocyanide does to a score
A packaged food's additive subscore starts at 100 and loses points for each additive on the label; that subscore is a third of the final score. Potassium ferrocyanide takes no points off a product's score. Scan the pack in Sito and the score you get is the one for your own child's age, with this additive named in the reasons. How we score has the whole method.
See what is in your own cupboard
Scan a packaged food and Sito names the additives in it, then scores the product out of 100 for your child's age.
What the sources found
Every classification in our table comes from the citations below, and nothing else. Each finding is our one-line summary of what the source concluded, with the source and reference beside it.
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EFSA
Journal 2018;16(7):5374 — doi:10.2903/j.efsa.2018.5374
Group ADI 0.03 mg ferrocyanide ion/kg bw/day; refined exposure ~0.003 mg/kg bw/day in children and adolescents; no safety concern at authorised uses (salt and salt substitutes only).
Why this class
Clean current EFSA and FDA status. These rows exist so that an unfamiliar additive is never treated as a bad one: a missing row costs a product nothing, and a clean row says so with citations.
Our confidence in this row's classification is high. Medium or low does not mean the evidence is weak; it means something about the row is still being pinned down, usually a regulatory status confirmed from one source rather than two.
Questions parents ask
Is Potassium ferrocyanide (E536) safe for kids?
No risk identified. No regulator finding we score, so a product keeps its full additive subscore in Sito. The current status is clean: Group ADI 0.03 mg ferrocyanide ion/kg bw/day; refined exposure ~0.003 mg/kg bw/day in children and adolescents; no safety concern at authorised uses (salt and salt substitutes only) (EFSA Journal 2018;16(7):5374, doi:10.2903/j.efsa.2018.5374).
What is E536?
E536 is the E number for Potassium ferrocyanide, an additive. Open Food Facts tags it en:e536.
Next to it on the label
The E numbers either side of E536 in our table, then the closest additives of the same kind by number.
- Sodium ferrocyanide (E535), no risk identified
- Calcium ferrocyanide (E538), no risk identified
- Silicon dioxide (E551), no risk identified
- Calcium silicate (E552), moderate risk
- Magnesium silicates / talc (E553), moderate risk
- Sodium aluminium silicate (E554), high risk, flagged for young children