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EC number: 284-895-5
CAS number: 84989-06-0
The fraction of tar acids, rich in 2,4- and 2,5-dimethylphenol, recovered by distillation of low-temperature coal tar crude tar acids.
The study does not need to be conducted because the substance has a low
octanol water partition coefficient and the adsorption potential of this
substance is related to this parameter.
For PNEC derivation and environmental risk estimation a Koc value of 148
was used which was derived from the lowest log Kow value of 2.21 with
EUSES version 2.12.
In accordance with column 2 of Regulation (EC) No 1907/2006, Annex VIII,
9.3.1, the study does not need to be conducted because the substance has
a low octanol water partition coefficient and the adsorption potential
of this substance is related to this parameter. Available data for all
main components of Tar acids, xylenol fraction (CAS 84989-06-0)
demonstrate the log Kow to be below 3, i.e. xylenol-isomers: 2.09 to
2.42 (DEZA, 2010; EPA, 2010; Sangster, 1989); cresol-isomers: 1.94 to
1.98 (OECD SIDS, 2003; Sangster, 1989); ethyl-phenols: 2.09 to 2.58
(DEZA, 2010; Umeyama et al., 1971; Sangster, 1989), or
trimethyl-phenols: 2.67 to 2.73 (Sangster, 1989). Thus, Tar acids,
xylenol fraction (CAS 84989-06-0) exhibits low potential for adsorption.
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