| Synonyms | Magnesium hydrogen carbonate, magnesium subcarbonate (light or heavy), hydrated basic magnesium carbonate, magnesium carbonate hydroxide |
| Definition | |
| Chemical name | Magnesium carbonate hydroxide hydrated |
| Einecs | 235-192-7 |
| Chemical formula | 4MgCO3Mg(OH)25H2O |
| Molecular weight | 485 |
| Assay | Mg content not less than 40,0 % and not more than 45,0 % calculated as MgO |
| Description | Light, white friable mass or bulky white powder |
| Identification | |
A.Positive tests for magnesium and for carbonate | |
B.Solubility | Practically insoluble in water. Insoluble in ethanol |
| Purity | |
| Acid insoluble matter | Not more than 0,05 % |
| Water soluble matter | Not more than 1,0 % |
| Calcium | Not more than 1,0 % |
| Arsenic | Not more than 3 mg/kg |
| Lead | Not more than 10 mg/kg |
| Mercury | Not more than 1 mg/kg |
