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Physical & Chemical properties

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Description of key information

Additional information

Summary of the phys.-chem. key parameters:

Phys.-chem. Property Key parameter Remarks
Appearance/Physical state/Colour white, crystalline solid
Melting point 464 K
Boiling point ≥ 553 K  decomposition
Density at 20°C 1762.7 g/L
Vapour pressure at 20°C < 0.001 Pa calculated
Partition coefficient at 20°C -4.6 log Pow
Water solubility at 20°C / pH 7.5 534 g/L
Solubility in n-octanol at 20°C 11.7 mg/L
Surface tension at 20°C 69.9 mN/m c = 1 g/L
Autoflammability > 677 K no self-ignition below 404°C
Flammability non flammable
Explosiveness not explosive
Oxidizing properties not oxidizing
Dissociation constant pKa1 = 15.1 (hydroxyl group);
pKa2 = 1.39 (sulfonic acid function)