{
  "$schema": "https://foodadditiveindex.com/api/v1/schema.json",
  "id": "https://foodadditiveindex.com/additives/potassium-carbonate",
  "slug": "potassium-carbonate",
  "name": "Potassium carbonate",
  "identifiers": {
    "e_number": "E501",
    "ins_number": "501(i)",
    "cas_number": "584-08-7",
    "inchikey": "BWHMMNNQKKPAPP-UHFFFAOYSA-L",
    "pubchem_cid": 11430
  },
  "functional_class": "Acidity regulator",
  "summary": "Potassium carbonate is an alkaline acidity regulator used in cocoa processing, noodle making and some traditional baked goods.",
  "derivation_summary": "Manufactured by reacting potassium hydroxide with carbon dioxide. Historically it was obtained by leaching wood ash, which is the origin of the word potash.",
  "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 184.1619",
            "url": "https://www.ecfr.gov/current/title-21/section-184.1619"
          },
          "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": 17,
      "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 501(i)",
            "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: 407",
          "effective_from": "2019",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 501(i), 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: 234 & 631",
          "effective_from": "2024",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 501(i), 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": "01.4.1",
            "name": "Pasteurized cream (plain)"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": "GSFA notes: XS288",
          "effective_from": "2013",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 501(i), food category 01.4.1",
            "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": "01.4.2",
            "name": "Sterilized and UHT creams, whipping and whipped creams, and reduced fat creams (plain)"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": null,
          "effective_from": "2013",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 501(i), food category 01.4.2",
            "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 501(i), 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": "04.2.2.7",
            "name": "Fermented vegetable (including mushrooms and fungi, roots and tubers, pulses and legumes, and aloe vera) and seaweed products, excluding fermented soybean products of food categories 06.8.6, 06.8.7, 12.9.1,"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": "GSFA notes: XS294",
          "effective_from": "2023",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 501(i), food category 04.2.2.7",
            "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": "06.4.1",
            "name": "Fresh pastas and noodles and like products"
          },
          "max_level": 11000,
          "max_level_unit": "mg/kg",
          "conditions": null,
          "effective_from": "2013",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 501(i), food category 06.4.1",
            "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": "06.4.2",
            "name": "Dried pastas and noodles and like products"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": "GSFA notes: 256",
          "effective_from": "2013",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 501(i), food category 06.4.2",
            "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": "09.2.2",
            "name": "Frozen battered fish, fish fillets and fish products, including molluscs, crustaceans, and echinoderms"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": "GSFA notes: 41",
          "effective_from": "2013",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 501(i), food category 09.2.2",
            "url": "https://www.fao.org/fao-who-codexalimentarius/codex-texts/dbs/gsfa/en/"
          },
          "source": "gsfa",
          "retrieved_at": "2026-09-07T07:54:15.059Z"
        },
        {
          "status": "permitted_with_conditions",
          "food_category": {
            "system": "codex",
            "code": "09.2.3",
            "name": "Frozen minced and creamed fish products, including molluscs, crustaceans, and echinoderms"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": null,
          "effective_from": "2015",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 501(i), food category 09.2.3",
            "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": "09.2.4",
            "name": "Cooked and/or fried fish and fish products, including molluscs, crustaceans, and echinoderms"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": null,
          "effective_from": "2015",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 501(i), food category 09.2.4",
            "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": "09.2.5",
            "name": "Smoked, dried, fermented, and/or salted fish and fish products, including molluscs, crustaceans, and echinoderms"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": "GSFA notes: 230, XS167, XS189, XS222, XS236, XS244 & XS311",
          "effective_from": "2018",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 501(i), food category 09.2.5",
            "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 501(i), 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 501(i), 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": "2023",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 501(i), 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": "14.1.5",
            "name": "Coffee, coffee substitutes, tea, herbal infusions, and other hot cereal and grain beverages, excluding cocoa"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": "GSFA notes: 160",
          "effective_from": "2013",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 501(i), food category 14.1.5",
            "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": "584-08-7",
      "type": "cas",
      "source": "ecfr"
    },
    {
      "name": "Alkaline Super Ionized Water",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Bestmade Natural Products Kali Carb",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "BQN1B9B9HA",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Carbonate of potash",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Carbonic acid, dipotassium salt",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Carbonic acid, potassium salt (1:2)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Caswell No. 685",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "CCRIS 7320",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "CLEANING-S",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Dcad plus",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Dipotassium cabonate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Dipotassium carbonate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "E 501(i)",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "EPA Pesticide Chemical Code 073504",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "FACE-BODY-S",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "FOOD-S",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Greenfish, Body-S",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Greenfish, Cleaning-S",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "HSDB 1262",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "INS NO.501(I)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "INS-501(I)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "K-Gran",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Kali Carb",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Kali carbonicum",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Kali carbonicum 200C",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Kali Carbonicum Kit Refill",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Kalium carbonicum",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Kalium carbonicum 12 Special Order",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Kalium carbonicum 6X",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Kaliumcarbonat",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "MOONSTAR FACE AND BODY MIST",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "MOONSTAR HAIR MIST",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "NARO AMOR",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "NARO COMO",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "NARO QUINN",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "NARO TIAMO",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Pearl ash",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potasium cabonate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potasium carbonate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potasiumcarbonate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potassium cabonate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potassium carbon ate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potassium carbonat",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium carbonate",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "Potassium carbonate (2:1)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium carbonate (K2(CO3))",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium carbonate (K2CO3)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium carbonate, anhydrous",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium carbonate-13C",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potassium-carbonate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potassiumcarbonat",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potassiumcarbonate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Salt of tartar",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "SANITALK COMY-ANIMAL SANITIZER(COVID-19)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "SANITALK GREEN-FRUIT,VEGETABLE",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "SANITALK-SANITIZER(COVID-19)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "ZEROQ",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "ZEROQ FACE BODY",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "ZEROQ FOOD",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "ZEROQ PET",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "E501",
      "type": "e_number",
      "source": "openfoodtox"
    },
    {
      "name": "501(i)",
      "type": "ins",
      "source": "gsfa"
    },
    {
      "name": "dipotassium;carbonate",
      "type": "iupac",
      "source": "openfoodtox"
    },
    {
      "name": "Potassium carbonate",
      "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 carbonate\", https://foodadditiveindex.com/additives/potassium-carbonate. This site reports regulatory status and does not rate additives.",
  "generated_at": "2026-09-08T00:09:38.644Z"
}