{
  "url": "https://openlegislation.uk/food-supplements-magnesium-l-threonate-monohydrate-wales-regulations-2026/schedule",
  "json_url": "https://openlegislation.uk/food-supplements-magnesium-l-threonate-monohydrate-wales-regulations-2026/schedule.json",
  "legislation": "wsi/2026/56",
  "legislation_title": "The Food Supplements (Magnesium L-threonate monohydrate) (Wales) Regulations 2026",
  "legislation_url": "https://openlegislation.uk/food-supplements-magnesium-l-threonate-monohydrate-wales-regulations-2026",
  "path": "schedule",
  "kind": "schedule",
  "number": null,
  "heading": "Purity criteria for magnesium L-threonate monohydrate",
  "text": "Magnesium L-threonate monohydrate\n(1)The number assigned to this substance by the Chemical Abstracts Service (www.cas.org/cas-data/cas-registry).\n(2)The dalton, or unified atomic mass unit, is a unit of mass defined as one twelfth of the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state and at rest.\n(3)United States Pharmacopeia.\nSynonym\nMagnesium L-threonate\nDefinition\nChemical name\nMagnesium (2R,3S)-2,3,4-trihydroxybutanoate monohydrate\nChemical formula\nC8H16MgO11\nCAS number\n500304-76-7\nMolecular weight\n312.51 Da\nColour (solid)\nWhite\nAssay\nMagnesium: 7.2 to 8.3%\nL-threonate: 82 to 91%\nDescription\nA water-soluble white powder which is manufactured via a chemical synthetic process.\nIdentification\nSolubility\nSoluble in water at 1% concentration at 25℃ and that is clear in solution at 1% concentration.\npH (USP (1% in H2O))\n5.8 to 7.0\nPurity\nLoss on drying\nNot more than 5.0% (105℃/4 hours)\nOxalic acid/oxalate\nNot more than 0.5% (as oxalic acid)\nArsenic\nNot more than 1 mg/kg\nLead\nNot more than 0.5 mg/kg\nCadmium\nNot more than 0.2 mg/kg\nMercury\nNot more than 0.1 mg/kg",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "(1)The number assigned to this substance by the Chemical Abstracts Service (www.cas.org/cas-data/cas-registry)."
    },
    {
      "type": "footnote",
      "label": "f2",
      "text": "(2)The dalton, or unified atomic mass unit, is a unit of mass defined as one twelfth of the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state and at rest."
    },
    {
      "type": "footnote",
      "label": "f3",
      "text": "(3)United States Pharmacopeia."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/wsi/2026/56/schedule",
    "retrieved_at": "2026-10-28T22:55:27.404119+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}