{
  "$schema": "https://foodadditiveindex.com/api/v1/schema.json",
  "id": "https://foodadditiveindex.com/additives/magnesium-oxide",
  "slug": "magnesium-oxide",
  "name": "Magnesium oxide",
  "identifiers": {
    "e_number": "E530",
    "ins_number": "530",
    "cas_number": "1309-48-4",
    "inchikey": "CPLXHLVBOLITMK-UHFFFAOYSA-N",
    "pubchem_cid": 14792
  },
  "functional_class": "Acidity regulator",
  "summary": "Magnesium oxide is an anticaking agent, acidity regulator and magnesium fortificant used in powdered foods and supplements.",
  "derivation_summary": "Produced by heating magnesium carbonate or hydroxide to drive off water and carbon dioxide.",
  "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 184.1431",
            "url": "https://www.ecfr.gov/current/title-21/section-184.1431"
          },
          "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": 6,
      "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 530",
            "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: 631",
          "effective_from": "2024",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 530, 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": "01.5.1",
            "name": "Milk powder and cream powder (plain)"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": "GSFA notes: 544 & 549",
          "effective_from": "2023",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 530, food category 01.5.1",
            "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": "01.8.2",
            "name": "Dried whey and whey products, excluding whey cheeses"
          },
          "max_level": 10000,
          "max_level_unit": "mg/kg",
          "conditions": "GSFA notes: XS331",
          "effective_from": "2023",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 530, 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": "12.1.1",
            "name": "Salt"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": null,
          "effective_from": "2006",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 530, 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": "12.2.1",
            "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 530, 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": "1309-48-4",
      "type": "cas",
      "source": "ecfr"
    },
    {
      "name": "Akro-mag",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Animag",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Anscor P",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Calcined brucite",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Calcined magnesia",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Calcined magnesite",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Cyclo/Mag",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "E 530",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "Elastomag 100",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Elastomag 170",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Granmag",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Heavy calcined magnesia",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Heavy magnesia",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Heavy magnesium oxide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "INS NO.530",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "INS-530",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "INSTAMAG",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "KMB 100-200",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Kyowamag 100",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Light magnesia",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Light magnesium oxide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Mag ox",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magcal",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magchem 100",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magdose",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Maglite D",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Maglite de",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Maglite K",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Maglite S",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Maglite Y",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magmilax bolus",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magnalax Bolus",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magnesa preprata",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magnesia",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magnesia monoxide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magnesia oxydata",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magnesia USTA",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magnesii oxidum",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magnesium (as oxide)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magnesium oxide",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "Magnesium oxide (MgO)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magnesium oxide, heavy",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magnesium oxide, light",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magnezu tlenek",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magox 85",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magox 90",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magox 95",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magox 98",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magox OP",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magstar",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Marmag",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Megnesium Oxide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "MVT Bolus",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Oromag 160",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Oxide, Magnesium",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Oximag",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Oxymag",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Seasorb",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Seawater magnesia",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "SLO 369",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "SLO 469",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Uro-Mag",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "E530",
      "type": "e_number",
      "source": "openfoodtox"
    },
    {
      "name": "530",
      "type": "ins",
      "source": "gsfa"
    },
    {
      "name": "oxomagnesium",
      "type": "iupac",
      "source": "openfoodtox"
    },
    {
      "name": "Magnesium oxide",
      "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, \"Magnesium oxide\", https://foodadditiveindex.com/additives/magnesium-oxide. This site reports regulatory status and does not rate additives.",
  "generated_at": "2026-09-08T00:09:38.585Z"
}