{
  "$schema": "https://foodadditiveindex.com/api/v1/schema.json",
  "id": "https://foodadditiveindex.com/additives/sodium-sesquicarbonate",
  "slug": "sodium-sesquicarbonate",
  "name": "Sodium sesquicarbonate",
  "identifiers": {
    "e_number": null,
    "ins_number": "500(iii)",
    "cas_number": "533-96-0",
    "inchikey": "WCTAGTRAWPDFQO-UHFFFAOYSA-K",
    "pubchem_cid": 10791
  },
  "functional_class": "Acidity regulator",
  "summary": "Sodium sesquicarbonate is an alkali used to adjust acidity, midway in strength between bicarbonate of soda and washing soda.",
  "derivation_summary": "Mined as the mineral trona, or crystallised from sodium carbonate and bicarbonate together.",
  "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 184.1792",
            "url": "https://www.ecfr.gov/current/title-21/section-184.1792"
          },
          "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": 7,
      "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 500(iii)",
            "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 500(iii), 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: 12",
          "effective_from": "2024",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 500(iii), 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 500(iii), 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 500(iii), 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": "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 500(iii), 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": "12.2.1",
            "name": "Herbs and spices"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": "GSFA notes: 534, XS326 & XS351",
          "effective_from": "2025",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 500(iii), food category 12.2.1",
            "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": "533-96-0",
      "type": "cas",
      "source": "ecfr"
    },
    {
      "name": "72227-05-5",
      "type": "cas",
      "source": "pubchem"
    },
    {
      "name": "Carbicarb",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Carbonic acid, disodium salt, mixt. with monosodium salt",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Carbonic acid, sodium salt (2:3)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "CARBONIC ACID, SODIUM SALT, HYDRATE (2:3:2)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "E-500(III)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "HSDB 769",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "INS NO.500(III)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "INS-500(III)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magadi soda",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Na2CO3 NaHCO3",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "NaHCO3 Na2CO3",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "SESQUI TM",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Snowfine",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Snowflake crystals",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "sodium bicarbonate sodium carbonate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Sodium carbonate (3:2)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Sodium carbonate hydrogen carbonate (3/1/1)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "sodium carbonate sodium bicarbonate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Sodium carbonate sodium hydrogen carbonate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "sodium hydrogen carbonate sodium carbonate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "SODIUM MONOHYDROGENDICARBONATE",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "SODIUM SESQUICARBONATE",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "SODIUM-SALT OF CARBONIC ACID",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "SOLVAY T 200",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "SOLVAY T-200",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Trisodium hydrogendicarbonate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "trisodium;hydrogen carbonate;carbonate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "tron a",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Trona",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Urao",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "500(iii)",
      "type": "ins",
      "source": "gsfa"
    },
    {
      "name": "Sodium sesquicarbonate",
      "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, \"Sodium sesquicarbonate\", https://foodadditiveindex.com/additives/sodium-sesquicarbonate. This site reports regulatory status and does not rate additives.",
  "generated_at": "2026-09-08T00:09:38.703Z"
}