Registration Dossier
Registration Dossier
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EC number: 292-607-4 | CAS number: 90640-86-1 Distillate from the fractional distillation of coal tar of bituminous coal, with boiling range of 240°C to 400°C (464°F to 752°F). Composed primarily of tri- and polynuclear hydrocarbons and heterocyclic compounds.
Bioaccumulation: terrestrial
Administrative data
Link to relevant study record(s)
Description of key information
Based on a log Pow of 4.93 (Pow = 83,180), the BCF for earthworm was estimated following the procedure described in the Technical Guidance Document (EC 2003, part II) (see below).
Key value for chemical safety assessment
- BCF (terrestrial species):
- 1 000 L/kg ww
Additional information
According to Guidance on IR&CSA - Chapter R.16: Environmental Exposure Estimation, R.16.6.7.2 (p. 91), bioconcentration in earthworm can be described for organic substances as a hydrophobic partitioning between the pore water and the phases inside the organism. This equilibrium partitioning approach can be modelled according to the following equation as described by Jager (1998):
BCFearthworm= (0.84 + 0.012Pow) / ROHearthworm
where for ROHearthwormby default a value of 1 (kg wwt/L) can be assumed.
The Pow used for AOH is estimated to be 4.92 (see Chapter 1.3 - Partition coefficient).
BCFearthworm= (0.84 + 0.012 x 83,180) / 1
= 999 L/kg ww
Reference (in Guidance document on IR&CSA - Chapter R.16):
Jager T (1998) Mechanistic approach for estimating bioconcentration of organic chemicals in earthworms (Oligochaeta). Environ. Toxicol. Chem. 17, 2080-2090
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