Registration Dossier
Registration Dossier
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EC number: 701-305-8 | CAS number: -
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
The chemical structure and insolubility in water and organic solvents of Pitch, coal tar, high-temp., < 1% 4- to 5-membered condensed ring aromatic hydrocarbons [EC no. 701-305-8]] (CTPhtht) prevents to determine a representative Pow. The determination of a Pow value of the target compound is not applicable but to single PAHs.
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 6.13
- at the temperature of:
- 20 °C
Additional information
More than 99 % of Pitch, coal tar, high-temp., < 1% 4- to 5-membered condensed ring aromatic hydrocarbons [EC no. 701-305-8] is not accessible to chemical analysis due to the absence of identifiable components: Only a residual amount of EPA PAHs of approx. 0.3 - 0.4 % (w/w) can be detected by GC analysis after toluene extraction.
Experimental efforts using the OECD method 117 (HPLC method) failed despite use of the highest methanol/water ratio and tetrahydrofuran as feasible and water-compatible solvent in order to mobilise pitch constituents (see LAUS 2014). The log Pow relates to benzo[a]pyrene.
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