Schedule Purity criteria for magnesium L-threonate monohydrate
| Magnesium L-threonate monohydrate | |
|---|---|
(1) The number assigned to this substance by the Chemical Abstracts Service (www.cas.org/cas-data/cas-registry). | |
(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. | |
(3) United States Pharmacopeia. | |
| Synonym | Magnesium L-threonate |
| Definition | |
| Chemical name | Magnesium (2R,3S)-2,3,4-trihydroxybutanoate monohydrate |
| Chemical formula | C8H16MgO11 |
| CAS number | 500304-76-7f1 |
| 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 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 mg/kg |
| Lead | Not more than 0.5 mg/kg |
| Cadmium | Not more than 0.2 mg/kg |
| Mercury | Not more than 0.1 mg/kg |
Annotations
Footnotes
- f1
(1)
The number assigned to this substance by the Chemical Abstracts Service (www.cas.org/cas-data/cas-registry).
- f2
(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.
- f3
(3)
United States Pharmacopeia.