(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,

Chemical name,Magnesium (2R,3S)-2,3,4-trihydroxybutanoate monohydrate,
Chemical formula,C 8 H 16 MgO 11,
CAS number,500304-76-7,
Molecular weight,312.51 Da,
Colour (solid),White,
Assay,  Magnesium: 7.2 to 8.3%    L-threonate: 82 to 91%  ,
A water-soluble white powder which is manufactured via a chemical synthetic process.,

Solubility,Soluble in water at 1% concentration at 25℃ and that is clear in solution at 1% concentration.,
pH (USP (1% in H 2 O)),5.8 to 7.0,

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,