Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

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