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Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

Summary of the phys.-chem. key parameters:

Phys.-chem. Property

Key parameter


Appearance/Physical state/Colour

white powder


Melting point


Range: 141-190°C

Boiling point

not applicable

substance decomposes before boiling at ca. 344°C

Density at 20°C

1.30 g/cm³


Vapour pressure at 20°C

2.2 x 10E-6 Pa

Partition coefficient at 20°C


log Pow

Water solubility at 20°C

0.075 g/L

 Determined as critical micelle concentration

Solubility in n-octanol at 20°C

1.72 g/L


Surface tension at 20°C

30.6 mN/m

c = 1000 mg/L


d(50) = 166.5 µm


non flammable



not explosive


Oxidizing properties

not oxidizing


Dissociation constant at 25 °C

pKa = 1.42

 pKa estimated by calculation related to dissociation of sulfonic acid function