{
  "url": "https://openlegislation.uk/draft-food-supplements-purity-criteria-magnesium-l-threonate-monohydrate-england-regulations-2026/schedule",
  "json_url": "https://openlegislation.uk/draft-food-supplements-purity-criteria-magnesium-l-threonate-monohydrate-england-regulations-2026/schedule.json",
  "legislation": "ukdsi/2026/9780348282573",
  "legislation_title": "The Food Supplements Purity Criteria (Magnesium L-threonate monohydrate) (England) Regulations 2026",
  "legislation_url": "https://openlegislation.uk/draft-food-supplements-purity-criteria-magnesium-l-threonate-monohydrate-england-regulations-2026",
  "path": "schedule",
  "kind": "schedule",
  "number": null,
  "heading": "PURITY CRITERIA FOR MAGNESIUM L-THREONATE MONOHYDRATE",
  "text": "Synonym\nMagnesium L-threonate\nDefinition\nChemical name\nMagnesium (2R,3S)-2,3,4-trihydroxybutanoate monohydrate\nCAS number\n500304-76-7\nChemical formula\nC 8H 16MgO 11\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 ppm\nLead\nNot more than 0.5 ppm\nCadmium\nNot more than 0.2 ppm\nMercury\nNot more than 0.1 ppm",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "This is a reference to the CAS Registry Number assigned to this preparation by the Chemical Abstracts Service. This is available at https://www.cas.org/cas-data/cas-registry"
    },
    {
      "type": "footnote",
      "label": "f2",
      "text": "United States Pharmacopoeia (USP), published by the United States Pharmacopeial Convention in Rockville, Maryland, USA. General Chapter 791 pH of the USP was revised in 2014 by a Supplement to the USP, published on 1st December 2014 (ISBN number 1936424223). USP is a nonprofit scientific organisation that develops and disseminates public compendial quality standards for medicines and other articles. The USP is available at https://www.usp.org"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/ukdsi/2026/9780348282573/schedule",
    "retrieved_at": "2026-10-30T14:37:32.546332+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."
}