Seven water magnesium sulfate, magnesium sulfate crystals, the English name: Magnesium sulfate heptahydrate CAS No.: 10034-99-8 EINECS No.: 242-691-3 Formula: MgSO4.7H2O Molecular Weight: 246.46956 InChI: InChI = 1Mg.H2O4S.7H2Oc ; 1-5 (2,3) 4 ;;;;;;; h; (H2,1,2,3,4); 71H2q + 2 ;;;;;;;; p-2 molecular structure: Melting point: 1124 ℃ Boiling point: 330 ° C at 760 mmHg Vapor Pressure: 3.35E-05mmHg at 25 ° C Properties: Characters are generally refers to seven industrial magnesium sulfate monohydrate. Colorless fine needles or oblique columnar crystals. Odorless, bitter taste. The relative density of 1.68 Solubility soluble in water, slightly soluble in ethanol and glycerol. Application: leather, fertilizer, porcelain, matches, printing and dyeing, pharmaceutical and other industries price 3.8 yuan / kg