Registration Dossier
Registration Dossier
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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: aquatic / sediment
Administrative data
Link to relevant study record(s)
Description of key information
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.
Key value for chemical safety assessment
- BCF (aquatic species):
- 608 dimensionless
Additional information
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 This value is in line with an unpublished fish feeding study (rainbow trout: Oncorhyncus mykiss): BCF = 977 with a very short depuration half-life of 1.1 d (Lampi et al. 2009: CONCAWE review).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: https://echa.europa.eu/documents/10162/433ccfe1-f9a5-4420-9dae-bb316f898fe1)
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
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