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Physical & Chemical properties

Water solubility

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Description of key information

At a loading of 1000 mg pitch/L, the mean TOC of the water-soluble fraction (WAF) was 0.24 mg/L. at 20 °C. A total of 0.8 to 1.4 µg/L was found in the WAF of a loading of 100 mg/L at 21 °C, related to the 16 EPA PAHs. 

Key value for chemical safety assessment

Water solubility:
0.002 mg/L
at the temperature of:
20 °C

Additional information

The stated water solubility relates to the marker substance, benzo(a)pyrene (EU 2008, Tab. 1.6). Water solubility of pitch, coal tar, high temp is different and depends on the load of the solution (see aside).


EU (2008) Coal-Tar Pitch, high temperature - Risk Assessment. European Union Risk Assessment Report, The Netherlands [ ]

According to EU 2008, presented data from:

Mackay D, Shiu WY, Ma KC (1992). lllustrated Handbook of Physical-Chemical Properties and Environmental Fate of Organic Chemicals.Lewis Publishers, Boca Raton, FL.