Schedule PURITY CRITERIA FOR MAGNESIUM L-THREONATE MONOHYDRATE
| Synonym | Magnesium L-threonate |
| Definition | |
| Chemical name | Magnesium (2R,3S)-2,3,4-trihydroxybutanoate monohydrate |
| CAS number | 500304-76-7 f1 |
| Chemical formula | C 8H 16MgO 11 |
| Molecular weight | 312.51 Da |
| Colour (solid) | White |
| Assay | Magnesium: 7.2% to 8.3% L-threonate: 82% to 91% |
| Description | A water-soluble white powder which is manufactured via a chemical synthetic process. |
| Identification | |
| Solubility | Soluble in water at 1% concentration at 25℃ and that is clear in solution at 1% concentration. |
| pH USP f2 (1% in H₂O) | 5.8 to 7.0 |
| Purity | |
| Loss on drying | Not more than 5.0% (105℃/4 hours) |
| Oxalic acid/oxalate | Not more than 0.5% (as oxalic acid) |
| Arsenic | Not more than 1 ppm |
| Lead | Not more than 0.5 ppm |
| Cadmium | Not more than 0.2 ppm |
| Mercury | Not more than 0.1 ppm |
Annotations
Footnotes
- f1
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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
- f2
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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