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EC number: 266-028-2
CAS number: 65996-93-2
The residue from the distillation of high temperature coal tar. A black solid with an approximate softening point from 30°C to 180°C (86°F to 356°F). Composed primarily of a complex mixture of three or more membered condensed ring aromatic hydrocarbons.
Bioaccumulation is not applicable to pitch, coal tar, high-temp.
(coal-tar pitch) due to its inert matrix structure and low
bioavailability. Provisionally, benzo[a]pyrene is used as marker
substance to characterise the bioaccumulation potential of coal-tar
pitch. Thus, the BCF value of BaP is used in the chemical safety
assessment of coal-tar pitch.
The BCF in fish of 608 (sunfish: Lepomis macrochirus) determined with
BaP as test substance was the only value of a study among 13 published
investigations to be given the high reliability of 2 in the risk
assessment report for coal-tar pitch (EU 2008, Tab. 3.28). This value is
in line with an unpublished fish feeding study (rainbow trout:
Oncorhyncus mykiss): BCF = 977 with a very short depuration half-life of
1.1 d (Lampi et al. 2009: CONCAWE review).
This suggests that the BCF of BaP should be distinctly below 2000.
Sources: Lampi M and Parkerton T (2009) Bioaccumulation Assessment of
PAHs - Review Paper Prepared for CONCAWE, October 2009
EU (2008) Coal-Tar Pitch, high temperature - Risk Assessment. European
Union Risk Assessment Report, The Netherlands (URL:
According to EU 2008, presented data from: Jimenez BD, Cirmo CP, and
McCarthy JF (1987) Effects of feeding and temperature on uptake,
elimination and metabolism of benzo(a)pyrene in the bluegill sunfish
(Lepomis macrochirus). Aquat. Toxicol., 10, 41-57
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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