E536Potassium ferrocyanide

E536 is potassium ferrocyanide. In Appendix 1 of Circular 24/2019/TT-BYT it has the function anticaking agent.

Did you know? Besides acting as an anticaking agent in salt, ferrocyanide is used as a processing aid in the production of wine; the EU Scientific Committee on Food (SCF, 1991, quoted by EFSA in 2018) noted that only small residues are found.

Code: E536 · INS 536
Group: Anticaking agent

In Vietnam✓ PermittedOn the list of permitted additives — Circular 24/2019, Appendix 1

Risk level on the Yenzo Scalelow?Based on the Open Food Facts additives taxonomy

How E536 appears on labels

IngredientsIllustrative example

Wheat flour, vegetable oil, salt, sugar, anticaking agent (536), dried onion and garlic, pepper, natural colour (160a).

anticaking agent (536)anticaking agent 536E536INS 536On Vietnamese labels: Kali ferrocyanid

Potassium ferrocyanide in food

Table salt

Salt substitutes

Questions about potassium ferrocyanide

What is E536 (potassium ferrocyanide)?

According to Appendix 1 of Circular 24/2019/TT-BYT, potassium ferrocyanide (INS 536) has the function anticaking agent.

Is potassium ferrocyanide harmful?

In 2018 EFSA set a group ADI of 0.03 mg/kg body weight per day, expressed as ferrocyanide ion, for sodium, potassium and calcium ferrocyanide (E535–E538), and concluded that they are of no safety concern at the current authorised uses and use levels. The highest estimated exposure, in children and adolescents, was about 0.003 mg ferrocyanide ion/kg body weight per day.

Is E536 permitted in Vietnam?

Yes. Potassium ferrocyanide (INS 536) is listed in Appendix 1 of Circular 24/2019/TT-BYT, the list of additives permitted in food.

Other anticaking agents

E530Magnesium oxidevery low E535Sodium ferrocyanidelow E538Calcium ferrocyanidelow E551Silicon dioxidelow E552Calcium silicatelow E553Magnesium silicates or talc (type not printed)low

See all anticaking agents →

Updated 21 October 2026

How Yenzo scores

Sources (3)

Open Food Facts additives taxonomy (Yenzo's table cites no EFSA opinion for this code). Open Food Facts additives taxonomy, https://github.com/openfoodfacts/openfoodfacts-server/blob/main/taxonomies/additives.txt (entry en:e536)
Thông tư 24/2019/TT-BYT (văn bản hợp nhất 09/VBHN-BYT), Phụ lục 1
EFSA Journal (2018). Re-evaluation of sodium ferrocyanide (E 535), potassium ferrocyanide (E 536) and calcium ferrocyanide (E 538) as food additives

Information only, not medical advice. The risk level is the additive's class in Yenzo's open scoring method, based on the cited source.