White hygroscopic solid

-935 kJ·mol^-1

(decomposes to basic sulfate and then oxide)

4.691 g/cm³ (anhydrous)
3.79 g/cm³ (monohydrate)
3.08 g/cm³ (octahydrate)

anhydrous:
75 g/100 mL (0 °C)
76.4 g/100 mL (25 °C)
58.4 g/100 mL (99 °C)

---

octahydrate:
very soluble in water

insoluble in ethanol

1000 °C (anhydrous)
105 °C (monohydrate)
40 °C (octahydrate)

123 J·mol^-1·K^-1

Carc. Cat. 2

Muta. Cat. 2

Very toxic (T+)

Repr. Cat. 2

Dangerous for the environment (N)

EV2700000

048-009-00-9

2570

S53,S45,S60,S61

280 mg/kg (oral, rat)

R45,R46,R60,R61,R25,R26,R48/23/25,R50/53