Registration Dossier
Registration Dossier
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EC number: 269-110-6 | CAS number: 68187-58-6 The residue from the distillation of thermal cracked or steam-cracked residuum and/or catalytic cracked clarified oil with a softening point from 40°C to 180°C (104°F to 356°F). Composed primarily of a complex combination 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 petro pitch. Provisionally, the BCF for benzo[a]pyrene is provided.
Key value for chemical safety assessment
- BCF (aquatic species):
- 608 dimensionless
Additional information
As for the structure analogue pitch, coal tar, high-temp., benzo[a]pyrene (BaP) is also used as marker substance for petro pitch in order to characterise environmental properties of petro 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 This value is in line with an unpublished fish feeding study using also BaP as test substance (rainbow trout: Oncorhyncus mykiss): BCF = 977 with a very short depuration half-life of 1.1 d (Lampi et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
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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