{
  "$schema": "https://foodadditiveindex.com/api/v1/schema.json",
  "id": "https://foodadditiveindex.com/additives/potassium-ferrocyanide",
  "slug": "potassium-ferrocyanide",
  "name": "Potassium ferrocyanide",
  "identifiers": {
    "e_number": "E536",
    "ins_number": "536",
    "cas_number": "13943-58-3",
    "inchikey": "XOGGUFAVLNCTRS-UHFFFAOYSA-N",
    "pubchem_cid": 9605257
  },
  "functional_class": "Anticaking agent",
  "summary": "Potassium ferrocyanide is an anticaking agent for table salt, added in tiny amounts to stop it clumping. Despite the name it contains no free cyanide: the cyanide is locked to iron in a complex that does not release it.",
  "derivation_summary": "Manufactured from hydrogen cyanide, iron salts and potassium hydroxide. The resulting complex is stable and passes through unchanged, which is why it is permitted at all.",
  "regulatory_status": [
    {
      "jurisdiction": "US",
      "jurisdiction_name": "United States",
      "authority": "Food and Drug Administration",
      "status": "not_listed",
      "status_label": "Not listed",
      "note": "Does not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.",
      "provision_count": 0,
      "provisions": []
    },
    {
      "jurisdiction": "CODEX",
      "jurisdiction_name": "Codex Alimentarius",
      "authority": "Codex Alimentarius Commission / JECFA",
      "status": "permitted_with_conditions",
      "status_label": "Permitted, with conditions",
      "provision_count": 3,
      "provisions": [
        {
          "status": "permitted_with_conditions",
          "food_category": {
            "system": "codex",
            "code": "12.1.1",
            "name": "Salt"
          },
          "max_level": 14,
          "max_level_unit": "mg/kg",
          "conditions": "GSFA notes: 24 & 107",
          "effective_from": "2006",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 536, food category 12.1.1",
            "url": "https://www.fao.org/fao-who-codexalimentarius/codex-texts/dbs/gsfa/en/"
          },
          "source": "gsfa",
          "retrieved_at": "2026-09-07T07:54:15.059Z"
        },
        {
          "status": "permitted_with_conditions",
          "food_category": {
            "system": "codex",
            "code": "12.1.2",
            "name": "Salt substitutes"
          },
          "max_level": 20,
          "max_level_unit": "mg/kg",
          "conditions": "GSFA notes: 24",
          "effective_from": "1999",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 536, food category 12.1.2",
            "url": "https://www.fao.org/fao-who-codexalimentarius/codex-texts/dbs/gsfa/en/"
          },
          "source": "gsfa",
          "retrieved_at": "2026-09-07T07:54:15.059Z"
        },
        {
          "status": "permitted_with_conditions",
          "food_category": {
            "system": "codex",
            "code": "12.2.2",
            "name": "Seasonings and condiments"
          },
          "max_level": 20,
          "max_level_unit": "mg/kg",
          "conditions": "GSFA notes: 24",
          "effective_from": "1999",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 536, food category 12.2.2",
            "url": "https://www.fao.org/fao-who-codexalimentarius/codex-texts/dbs/gsfa/en/"
          },
          "source": "gsfa",
          "retrieved_at": "2026-09-07T07:54:15.059Z"
        }
      ]
    }
  ],
  "names": [
    {
      "name": "13943-58-3",
      "type": "cas",
      "source": "openfoodtox"
    },
    {
      "name": "E 536",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "Ferrate(4-), hexakis(cyano-kappaC)-, potassium (1:4), (OC-6-11)-",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Ferrate(4-), hexakis(cyano-kappaC)-, tetrapotassium, (OC-6-11)-",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Ferrate(4-a)a, hexakis(cyano-aI masculineC)a-a, potassium (1:4)a, (OC-a6-a11)a-",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "gelbes Blutlaugensalz",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "HEXACYANOFERRATE OF POTASSIUM",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "INS NO.536",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "INS-536",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Kaliumhexazyanoferrat(II)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "lambda6-iron(6+) ion tetrapotassium hexakis(iminomethanide)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "OCPOWIWGGAATRP-UHFFFAOYSA-N",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potassium (iii) ferrocyanide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium (Oc-6-11)-Hexakis(Cyano-Kappa-C)Ferrate(4-)(4:1)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium ferrocyanate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium ferrocyanide",
      "type": "common",
      "source": "gsfa"
    },
    {
      "name": "Potassium ferrocyanide, solution",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potassium hexacyanidoferrate(4-)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potassium hexacyanidoferrate(II)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium hexacyanoferrate",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "potassium hexacyanoferrate(4-)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium hexacyanoferrate(II)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Tetrapotassium ferrocyanide",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "tetrapotassium hexacyanidoferrate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Tetrapotassium hexacyanoferrate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Tetrapotassium hexacyanoferrate(4-)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Tetrapotassium hexacyanoferrate(II)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Tetrapotassium hexakis(cyanido-kappaC)ferrate(4-)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "tetrapotassium hexakis(cyanido-kappakappaC)ferrate(4-)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Tetrapotassium Hexakis(Cyano-C)Ferrate(4-)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "tetrapotassium;iron(2+);hexacyanide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Yellow prussiate of potash",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "E536",
      "type": "e_number",
      "source": "openfoodtox"
    },
    {
      "name": "536",
      "type": "ins",
      "source": "gsfa"
    },
    {
      "name": "Potassium hexacyanoferrate(II)",
      "type": "iupac",
      "source": "openfoodtox"
    },
    {
      "name": "Tetrapotassium hexacyanoferrate trihydrate; Tetrapotassium hexacyanoferrate(4-) trihydrate",
      "type": "iupac",
      "source": "pubchem"
    }
  ],
  "hazard_reference_values": [
    {
      "type": "ADI",
      "value": 0.03,
      "value_text": null,
      "unit": "mg/kg bw/day",
      "population": "consumers",
      "assessing_body": "EFSA",
      "year": null,
      "opinion": null
    }
  ],
  "sources": [
    {
      "key": "gsfa",
      "name": "Codex General Standard for Food Additives (CXS 192-1995)",
      "publisher": "Codex Alimentarius Commission (FAO/WHO)",
      "licence": "FAO terms — non-commercial use with attribution",
      "url": "https://www.fao.org/fao-who-codexalimentarius/codex-texts/dbs/gsfa/en/",
      "retrieved_at": "2026-09-07T07:54:15.059Z"
    }
  ],
  "citation_policy": "Cite as: Food Additive Index, \"Potassium ferrocyanide\", https://foodadditiveindex.com/additives/potassium-ferrocyanide. This site reports regulatory status and does not rate additives.",
  "generated_at": "2026-09-08T00:09:38.649Z"
}