English name: Magnesium sulfate heptahydrate; Epsom salt; Bitter salt e
Other names: Crystalline Magnesium Sulfate; Bitter Salt; Sulphuric Acid; Xieli Salt; Magnesium Sulfate Heptahydrate
CAS number: 10034-99-8
MgSO4 • 7H2O = 246.47
Level: 4N
Properties: white needle-like crystal or powder. Bitter, salty and cool. Weathered. Loss of 1 molecule of crystalline water in dry air at normal temperature, 4 molecules of crystalline water at 70 ～ 80 ℃, 5 molecules of crystalline water at 100 ℃, and 6 molecules of crystalline water at 120 ℃ Moisture, lose all crystal water at about 250 ℃. Solubility in water (G / 100ml): 71 at 20 ° C and 91 at 40 ° C. Slowly soluble in glycerol, slightly soluble in ethanol. The aqueous solution is neutral (pH 6-7). Relative density 1.67 white needle crystal or powder. Bitter, salty and cool. Weathered. Loss of 1 molecule of crystalline water in dry air at normal temperature, 4 molecules of crystalline water at 70 ～ 80 ℃, 5 molecules of crystalline water at 100 ℃, and 6 molecules of crystalline water at 120 ℃ Moisture, lose all crystal water at about 250 ℃. Solubility in water (G / 100ml): 71 at 20 ° C and 91 at 40 ° C. Slowly soluble in glycerol, slightly soluble in ethanol. The aqueous solution is neutral (pH 6-7). The relative density is 1.67.
Uses: biochemical research. Used to precipitate lead in the analysis. Mordant
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