| Description | Bulky white powder odourless |
| Solubility | Practically insoluble in water and ethanol 95%, It dissolves in dilute acids. |
| Standard | Magnesium Hydroxide contains not less than 95% and not more than 100.5% of Magnesium Hydroxide |
| Arsenic | Not more than 4 ppm |
| Heavy Metals | Not more than 30 ppm |
| Chloride | Not more than 0.1% |
| Sulphate | Not more than 0.5% |
| Calcium | Not more than 1.5% |
| Iron | Not more than 0.08% |
| Soluble Subs. | Not more than 1.0% |
| Insoluble in Acetic Acid | Limit 0.05% to 0.1% |
| Assay (as Mg(OH)₂) | Between 95.0% and 100.5% |
| Loss on Ignition | 30.0 to 32.5% |
Mainly used in antacid tablets,effluent treatment, and other magnesium salts, food nutritional products along with vitamins and antioxidants, fuel oil, coal additives & stack SO2 absorption.