Magnesium Sulfate CAS#7487-88-9
High Solubility: Magnesium sulfate exhibits good solubility in water, slightly soluble in ethanol, and insoluble in most organic solvents, supporting its wide application in agriculture, food and industrial fields.
Stable Performance: Its aqueous solution is weakly acidic, and the anhydrous grade has moderate hygroscopicity. Heptahydrate form keeps stable under sealed and cool storage conditions.
Versatile Uses: It is widely used as magnesium fertilizer, feed additive, food coagulant, desiccant, and raw material for pharmaceutical preparation.
Crystalline Form & Hygroscopic Nature: This material is supplied as a white crystalline solid or powder; the common heptahydrate form is less hygroscopic, while anhydrous magnesium sulfate readily absorbs moisture, requiring proper packaging to avoid caking.
Magnesium sulfate, characterized by the molecular formula MgSO₄, presents as a white crystalline solid or powder with moderate hygroscopic properties for anhydrous grade. It exhibits high solubility in water (350 g/L at 20°C), slightly soluble in ethanol, and insoluble in acetone. A 10% aqueous solution of this compound shows a pH range of 5.0–7.0, and the aqueous solution maintains good stability at normal temperature. The substance may cause mild irritation to eyes, skin and respiratory tract, and it is utilized for agricultural magnesium fertilizer, feed nutrition supplement, food processing additive, laboratory desiccant, and pharmaceutical raw material.
Magnesium Sulfate Chemical Properties
| Item | Specification |
|---|---|
| Melting point | 1124 °C (dec.)(lit.) |
| Density | 2.66 g/cm³ (anhydrous) |
| Refractive index | 1.523 |
| Storage temp | Store below +30°C, keep sealed |
| Solubility | Water: 350 g/L (20°C); slightly soluble in ethanol, insoluble in acetone |
| Form | Crystalline solid / powder |
| Color | White |
| Odor | Odorless |
| PH Range | 5.0–7.0 (10% aqueous solution, 20℃) |
| Water Solubility | 350 g/L (20 º C) |
| Sensitive | Hygroscopic (anhydrous) |
| Stability | Stable. Incompatible with strong bases, strong oxidizing agents |
| CAS DataBase Reference | 7487-88-9 (CAS DataBase Reference) |
| NIST Chemistry Reference | Magnesium sulfate (7487-88-9) |
| EPA Substance Registry System | Magnesium sulfate (7487-88-9) |
Safety Information
| Item | Specification |
|---|---|
| Hazard Codes | Xi |
| Risk Statements | 36/37/38 |
| Safety Statements | 26-36 |
| WGK Germany | 1 |
| RTECS | OM4500000 |
| TSCA | Yes |
| HS Code | 28332100 |
This compound is employed as magnesium fertilizer for crops, mineral supplement for animal feed, desiccant for organic synthesis, and coagulant in food industry. It also functions as a raw material for laxative pharmaceutical formulations, additive for cement and fireproof materials, and electrolyte additive. Additionally, it finds application in wastewater treatment, textile printing and dyeing auxiliary, and bath salt raw material.
