| Sr. No. | Test Parameters | Specification / Limits |
|---|
| 1 | Description | A fine white powder amorphous powder. |
| 2 | Solubility | Practically insoluble in water, it dissolves in dilute acids with at most slight effervescence |
| 3 | Identification - A
B | (A) 15 gm has apparent volume before settling of about 150 ml
(B) It gives the reaction of Mg salts. |
| 4 | Appearance of solution | Solution S is not more intensely colored than Reference solution B2 |
| 5 | Arsenic | Not more than 4 ppm |
| 6 | Heavy Metals | Not more than 30 ppm |
| 7 | Chlorides | Not more than 0.15 % |
| 8 | Calcium | Not more than 1.5 % |
| 9 | Iron | Not more than 0.1 % |
| 10 | Loss on Ignition | Not more than 8.0 % |
| 11 | Sulphate | Not less than 1.0 % |
| 12 | Soluble Substances | Not more than 20 mg |
| 13 | Sub. Insoluble in Acetic acid | Not more than 5 mg |
| 14 | Assay as MgO | Bet. 98.0 % to 100.5 % (Ignited basis) |