Apperance
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reddish crystalline (anhydrous, monohydrate) pink salt (heptahydrate)
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Boiling Point
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420 °C (heptahydrate)
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Density
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3.71 g/cm3 (anhydrous) 3.075 g/cm3 (monohydrate) 2.019 g/cm3 (hexahydrate) 1.948 g/cm3 (heptahydrate)
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Flash Point
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Non-flammable
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Melting Point
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735 °C (anhydrous) 96.8 °C (heptahydrate)
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Odor
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odorless (heptahydrate)
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Refractive Index
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1.639 (monohydrate) 1.540 (hexahydrate) 1.483 (heptahydrate)
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Solubility
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anhydrous: 36.2 g/100 mL (20 °C) 38.3 g/100 mL (25 °C) 84 g/100 mL (100 °C) heptahydrate: 60.4 g/100 mL (3 °C) 67 g/100 mL (70 °C) in water
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Solubility
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''anhydrous:'' 1.04 g/100 mL (methanol, 18 °C) insoluble in ammonia ''heptahydrate:'' 54.5 g/100 mL (methanol, 18 °C)
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EU Index
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027-005-00-0
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European Hazard Symbols
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Carc. Cat. 2
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European Hazard Symbols
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Muta. Cat. 3
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European Hazard Symbols
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Repr. Cat. 2
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European Hazard Symbols
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Toxic (T)
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European Hazard Symbols
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Dangerous for the environment (N)
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LD50
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424 mg/kg (oral, rat)
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NFPA704
|
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Risk Statements
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R49, R60, R22, R42/43, R68, R50/53
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RTECS
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GG3100000 (anhydrous) GG3200000 (heptahydrate)
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Safety Statements
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S53, S45, S60, S61
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