CAS Number:7487‑88‑9
Synonyms:Magnesium sulphate; Epsom salt (heptahydrate); Magnesium sulfate; Anhydrous, hexahydrate, monohydrate forms
Chemical Formula:MgSO₄ · n H₂O (most common heptahydrate MgSO₄·7H₂O)
Product Introduction
A white, odorless crystalline salt available in various hydrates (anhydrous, monohydrate, heptahydrate). Heptahydrate (Epsom salt) is widely used in baths, agriculture, and medical therapies; anhydrous form is a trained desiccant in organic synthesis.
| Property | Anhydrous | Heptahydrate (Epsom) |
|---|---|---|
| Appearance | White crystalline solid | White crystalline hygroscopic solid |
| Density | 2.66 g/cm³ | 1.68 g/cm³ |
| Melting / Decomposition Point | ~1124 °C (decomposes) | ~150 °C (loses water) |
| Water Solubility @20 °C | 35.1 g/100 mL (anhydrous) | 113 g/100 mL (heptahydrate) |
| Vapor Pressure | <0.1 mm Hg @ 20 °C | — |
| Refractive Index (monohydrate) | 1.523 | 1.433 |
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