{
  "$schema": "https://foodadditiveindex.com/api/v1/schema.json",
  "id": "https://foodadditiveindex.com/additives/magnesium-hydroxide",
  "slug": "magnesium-hydroxide",
  "name": "Magnesium hydroxide",
  "identifiers": {
    "e_number": "E528",
    "ins_number": "528",
    "cas_number": "1309-42-8",
    "inchikey": "VTHJTEIRLNZDEV-UHFFFAOYSA-L",
    "pubchem_cid": 73981
  },
  "functional_class": "Colour",
  "summary": "Magnesium hydroxide is an alkaline acidity regulator and anticaking agent, used in canned goods and powdered products.",
  "derivation_summary": "Precipitated from seawater or magnesium salt solutions with an alkali.",
  "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 184.1428",
            "url": "https://www.ecfr.gov/current/title-21/section-184.1428"
          },
          "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": 10,
      "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 528",
            "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": "01.1.3",
            "name": "Fluid Buttermilk (plain)"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": "GSFA notes: 261",
          "effective_from": "2013",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 528, food category 01.1.3",
            "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": "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 528, 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": "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: 16 & XS166",
          "effective_from": "2017",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 528, 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": "GSFA notes: 16",
          "effective_from": "2013",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 528, 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": "2013",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 528, 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: XS167, XS189, XS222, XS236, XS244 & XS311",
          "effective_from": "2018",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 528, 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": "11.4",
            "name": "Other sugars and syrups (e.g. xylose, maple syrup, sugar toppings)"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": "GSFA notes: 258",
          "effective_from": "2013",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 528, food category 11.4",
            "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": "12.1.2",
            "name": "Salt substitutes"
          },
          "max_level": null,
          "max_level_unit": "GMP",
          "conditions": null,
          "effective_from": "2013",
          "citation": {
            "ref": "CXS 192-1995 Table One, INS 528, 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": "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 528, 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": "1309-42-8",
      "type": "cas",
      "source": "ecfr"
    },
    {
      "name": "Alcanex NHC 25",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Antacid-Laxative",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Baschem 12",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "CareOne Milk of Magnesia Cherry",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Careone Milk of magnesia Original",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Careone Milk of magnesia Original Milk of Magnesia Original",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Caustic magnesite",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Childrens Oral Saline Laxative",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "CVS Health Childrens",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "CVS Health Childrens Saline Laxative",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "CVS Magnesium Hydroxide Laxative Chew",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Dulcolax Chewy Bites Assorted Fruits",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Dulcolax Chewy Fruit Bites Cherry Berry",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Dulcolax Liquid",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Dulcolax Soft Chews Mixed Berry",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Dulcolax Soft Chews Watermelon",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "E 528",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "Equate Gentle Laxative Soft chew",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Equate Kids Gentle Laxative SC",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Gentle Laxative",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Humco Milk Of Magnesia",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Hydrate, Magnesium",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Hydroxide, Magnesium",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "INS NO.528",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "INS-528",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "LAXADE",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "MagLax",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magmex",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magmilax Powder",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "MAGNALAX",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magnesii hydroxidum",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magnesium (as hydroxide)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magnesium dihydroxide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magnesium hydrate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magnesium hydroxide",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "Magnesium hydroxide (Mg(OH)2)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Magnesium(II) hydroxide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Medibest Milk of Magnesia",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Meijer Magnesium Hydroxide Laxative Soft Chew",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Milk of magnesia",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Milk Of Magnesia Cherry",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Milk of Magnesia Concentrate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Milk Of Magnesia Liquid",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Milk Of Magnesia Mint",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Milk Of Magnesia Original",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "MiraFAST soft chews",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "MVT Powder",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "NBZ3QY004S",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Phillips Fresh Mint Milk Of Magnesia",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Phillips magnesia tablets",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Phillips milk of magnesia liquid",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Phillips Milk Of Magnesia Wild Cherry",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Phillips Original Milk Of Magnesia",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Premier Value Milk of Magnesia",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Sunmark Milk Of Magnesia",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Sunmark Milk Of Magnesia Mint",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "SUNMARK MILK OF MAGNESIA ORIGINAL",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Walgreens Blueberry Raspberry Gentle Laxative",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Walgreens Childrens",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Walgreens Childrens Saline Laxative",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "E528",
      "type": "e_number",
      "source": "openfoodtox"
    },
    {
      "name": "528",
      "type": "ins",
      "source": "gsfa"
    },
    {
      "name": "Magnesium dihydroxide",
      "type": "iupac",
      "source": "openfoodtox"
    },
    {
      "name": "Magnesium 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, \"Magnesium hydroxide\", https://foodadditiveindex.com/additives/magnesium-hydroxide. This site reports regulatory status and does not rate additives.",
  "generated_at": "2026-09-08T00:09:38.584Z"
}