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 | 500304-76-7f1 |
| Chemical formula | C8H16MgO11 |
| Molecular weight | 312.51 Daf2 |
| 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 USPf3 (1 % in H 2O) | 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 ppmf4 |
| Lead | Not more than 0.5 ppm |
| Cadmium | Not more than 0.2 ppm |
| Mercury | Not more than 0.1 ppm |
Annotations
Footnotes
- f1
-
This is a reference to the CAS Registry Number assigned to this preparation by the Chemical Abstracts Service https://www.cas.org/cas-data/cas-registry
- f2
-
The dalton (‘Da’), 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.
- f3
-
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). The USP is available at https://www.usp.org
- f4
-
A part per million (‘ppm’) is defined as one part of a substance per one million parts of a total mixture or solution. It is equal to a milligram per kilogram (‘mg/kg’).