Corrosive, highly toxic

20/21-28-45-60-61

VS6575000

23/25-33-50/53

130 g/100 mL (30 °C) in water

260 °C (533 K) (decomposes)

similar to H₂SO₄

Colorless deliquescent crystals

1.5174 (D-line, 20 °C)

2.95 g/cm³, solid

58 °C (331 K)