{
  "$schema": "https://foodadditiveindex.com/api/v1/schema.json",
  "id": "https://foodadditiveindex.com/additives/potassium-hydroxide",
  "slug": "potassium-hydroxide",
  "name": "Potassium hydroxide",
  "identifiers": {
    "e_number": "E525",
    "ins_number": "525",
    "cas_number": "1310-58-3",
    "inchikey": "KWYUFKZDYYNOTN-UHFFFAOYSA-M",
    "pubchem_cid": 14797
  },
  "functional_class": "Acidity regulator",
  "summary": "Potassium hydroxide is a strongly alkaline acidity regulator and processing aid, used in cocoa processing, olive curing and as a peeling agent for fruit.",
  "derivation_summary": "Manufactured by the electrolysis of potassium chloride solution.",
  "regulatory_status": [
    {
      "jurisdiction": "US",
      "jurisdiction_name": "United States",
      "authority": "Food and Drug Administration",
      "status": "permitted",
      "status_label": "Permitted",
      "provision_count": 1,
      "provisions": [
        {
          "status": "permitted",
          "food_category": null,
          "max_level": null,
          "max_level_unit": null,
          "conditions": null,
          "effective_from": null,
          "citation": {
            "ref": "21 CFR 184.1631",
            "url": "https://www.ecfr.gov/current/title-21/section-184.1631"
          },
          "source": "ecfr",
          "retrieved_at": "2026-09-07T18:25:51.549Z"
        }
      ]
    },
    {
      "jurisdiction": "CODEX",
      "jurisdiction_name": "Codex Alimentarius",
      "authority": "Codex Alimentarius Commission / JECFA",
      "status": "permitted_with_conditions",
      "status_label": "Permitted, with conditions",
      "provision_count": 8,
      "provisions": [
        {
          "status": "permitted",
          "food_category": null,
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": null,
          "effective_from": "1999",
          "citation": {
            "ref": "CXS 192-1995 Table Three, INS 525",
            "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": "01.1.2",
            "name": "Other Fluid Milk (plain)"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": "GSFA notes: 410",
          "effective_from": "2018",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 525, food category 01.1.2",
            "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": "01.2.1.2",
            "name": "Fermented milks (plain), heat-treated after fermentation"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": "GSFA notes: 630",
          "effective_from": "2024",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 525, food category 01.2.1.2",
            "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": "01.8.2",
            "name": "Dried whey and whey products, excluding whey cheeses"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": "GSFA notes: XS331",
          "effective_from": "2023",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 525, food category 01.8.2",
            "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": "13.1.1",
            "name": "Infant formulae"
          },
          "max_level": 2000,
          "max_level_unit": "mg/kg",
          "conditions": "GSFA notes: 55 & 551",
          "effective_from": "2026",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 525, food category 13.1.1",
            "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": "13.1.2",
            "name": "Follow-up formulae"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": "GSFA notes: 551",
          "effective_from": "2026",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 525, food category 13.1.2",
            "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": "13.1.3",
            "name": "Formulae for special medical purposes for infants"
          },
          "max_level": 2000,
          "max_level_unit": "mg/kg",
          "conditions": "GSFA notes: 55 & 551",
          "effective_from": "2026",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 525, food category 13.1.3",
            "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": "13.2",
            "name": "Complementary foods for infants and young children"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": "GSFA notes: XS73",
          "effective_from": "2023",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 525, food category 13.2",
            "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": "1310-58-3",
      "type": "cas",
      "source": "ecfr"
    },
    {
      "name": "0.1M Potassium hydroxide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "0.5M Potassium hydroxide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "11M Potassium hydroxide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Acid Number (AN) Standard: 0.1 mg KOH/g in Hydrocarbon Oil",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Acid Number (AN) Standard: 0.5 mg KOH/g in Hydrocarbon Oil",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Acid Number (AN) Standard: 1.0 mg KOH/g in Hydrocarbon Oil",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Acid Number (AN) Standard: 1.5 mg KOH/g in Hydrocarbon Oil",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Acid Number Standard 0.1 mgKOH/g. Reference materials intended for use in the determination of Acid",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Acid Number Standard 0.5 mgKOH/g. Reference materials intended for use in the determination of Acid",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Acid Number Standard 1 mgKOH/g. Reference materials intended for use in the determination of Acid Nu",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Acid Number Standard 2 mgKOH/g. Reference materials intended for use in the determination of Acid Nu",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Acid Number Standard 3 mgKOH/g. Reference materials intended for use in the determination of Acid Nu",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Aetzkali",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Base Number (BN) Standard: 10 mg KOH/g in Hydrocarbon Oil",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Base Number (BN) Standard: 15 mg KOH/g in Hydrocarbon Oil",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Base Number (BN) Standard: 30 mg KOH/g in Hydrocarbon Oil",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Base Number (BN) Standard: 40 mg KOH/g in Hydrocarbon Oil",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Base Number (BN) Standard: 6 mg KOH/g in Hydrocarbon Oil",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Base Number (BN) Standard: 70 mg KOH/g in Hydrocarbon Oil",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Base Number Standard 10 mgKOH/g. Reference material intended for use in the determination of Base Nu",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Base Number Standard 30 mgKOH/g. Reference materials intended for use in the determination of Base N",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Base Number Standard 6 mgKOH/g. Reference materials intended for use in the determination of Base Nu",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Caswell No. 693",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Caustic potash",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "Caustic-potash",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "CCRIS 6569",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Cyantek CC 723",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "E 525",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "EPA Pesticide Chemical Code 075602",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "HSDB 1234",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Hydroxyde de potassium",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "hydroxyl potassium",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "INS NO.525",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "INS-525",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Kali causticum",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Kalilauge",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Kaliumhydroxid",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Kaliumhydroxyde",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "KOH",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "MIRACLE WATER 3 in 1",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potash caustic",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potash lye",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassa",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potasse caustique",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassio (idrossido di)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium (hydroxyde de)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potassium -hydroxide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potassium hydorxide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potassium hydoxide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium hydrate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potassium hydroxid",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium hydroxide",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "Potassium hydroxide (K(OH))",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium Hydroxide (Semiconductor Grade)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium Hydroxide (~85%)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium hydroxide, flake",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium hydroxide, pellets",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potassium hyroxide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potassiumhydroxide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "WZH3C48M4T",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "E525",
      "type": "e_number",
      "source": "openfoodtox"
    },
    {
      "name": "525",
      "type": "ins",
      "source": "gsfa"
    },
    {
      "name": "potassium hydroxide",
      "type": "iupac",
      "source": "openfoodtox"
    },
    {
      "name": "Potassium hydroxide",
      "type": "label",
      "source": "ecfr"
    }
  ],
  "hazard_reference_values": [],
  "sources": [
    {
      "key": "ecfr",
      "name": "Electronic Code of Federal Regulations, Title 21",
      "publisher": "U.S. Government Publishing Office / National Archives",
      "licence": "Public domain",
      "url": "https://www.ecfr.gov/api/versioner/v1/full/2026-08-31/title-21.xml",
      "retrieved_at": "2026-09-07T18:25:51.549Z"
    },
    {
      "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 hydroxide\", https://foodadditiveindex.com/additives/potassium-hydroxide. This site reports regulatory status and does not rate additives.",
  "generated_at": "2026-09-08T00:09:38.650Z"
}