1.24 g/cm³

38 °C, 311 K (anhydrous)
103-106 °C, 376-379 K (monohydrate)

67 g/100 mL in water

-2.8 (water),
8.5 (acetonitrile)

colorless (white) solid

140°C (at 20 mmHg)

R36/37/38

skin irritant

S26