pKa
|
4.5 (hexahydrate)
|
Apperance
|
yellow solid (anhydrous) green-blue crystals (hexahydrate) blue crystals (heptahydrate)
|
Boiling Point
|
840 °C (anhydrous, decomp) 100 °C (hexahydrate, decomp)
|
Density
|
4.01 g/cm3 (anhydrous) 2.07 g/cm3 (hexahydrate) 1.948 g/cm3 (heptahydrate)
|
Flash Point
|
Non-flammable
|
Odor
|
odorless
|
Refractive Index
|
1.511 (hexahydrate) 1.467 (heptahydrate)
|
Solubility
|
65 g/100 mL (20 °C) 77.5 g/100 mL (30 °C) (heptahydrate) in water
|
Solubility
|
''anhydrous'' insoluble in ethanol, ether, acetone ''hexahydrate'' very soluble in ethanol, ammonia ''heptahydrate'' soluble in alcohol
|
EU Index
|
028-009-00-5
|
European Hazard Symbols
|
Carc. Cat. 1
|
European Hazard Symbols
|
Muta. Cat. 3
|
European Hazard Symbols
|
Repr. Cat. 2
|
European Hazard Symbols
|
Toxic (T)
|
European Hazard Symbols
|
Harmful (Xn)
|
European Hazard Symbols
|
Irritant (Xi)
|
European Hazard Symbols
|
Dangerous for the environment (N)
|
LD50
|
264 mg/kg
|
NFPA704
|
|
Risk Statements
|
R49, R61, R20/22, R38, R42/43, R48/23, R68, R50/53
|
RTECS
|
QR9600000
|
Safety Statements
|
S53, S45, S60, S61
|