Apperance
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white or pale yellow solid, hygroscopic
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Boiling Point
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120 °C (hexahydrate)
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Std enthalpy of formation
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-704 kJ·mol-1
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Density
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2.48 g/cm3 (anhydrous) 1.3 g/cm3 (hexahydrate)
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Melting Point
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192.4 °C *(anhydrous) 100 °C (hexahydrate)
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Std molar entropy
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111 J·mol-1·K-1
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Solubility
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43.9 g/100 ml (0 °C) 44.9 g/100 ml (10 °C) 45.8 g/100 ml (20 °C) 46.6 g/100 ml (30 °C) 47.3 g/100 ml (40 °C) 48.1 g/100 ml (60 °C) 48.6 g/100 ml (80 °C) 49 g/100 ml (100 °C) in water
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Solubility
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soluble in hydrogen chloride, ethanol, chloroform, carbon tetrachloride slightly soluble in benzene
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LD50
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anhydrous: 380 mg/kg, rat (oral) hexahydrate: 3311 mg/kg, rat (oral)
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Risk Statements
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R34
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RTECS
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BD0530000
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Safety Statements
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S1/2, S7/8, S28, S45
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