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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.
No potential for hydrolysis due to missing
Tar acids, Xylenol fraction (CAS 84989-06-0) is
considered as inherently biodegradable based on all available
information (weight-of-evidence). Further, the substance has a low
potential for accumulation in soil and sediment.
Low potential for bioaccumulation based on log Kow
Low potential for adsorption due to low octanol
water partition coefficient the parameter to which the adsorption
potential of this substance is related to.
With regard to the chemical structure having no
hydrolyzable functional group, constituents of Tar acids, xylenol
fraction, i.e. xylenols, cresols, ethyl phenols, ethyl cresols,
tri-/tetra-methyl phenols, are not expected to hydrolyse under
Although there is evidence that constituents like
cresols, ethylphenols or some xylenols are readily biodegradable Tar
acids, Xylenol fraction (CAS 84989-06-0) is considered as inherently
biodegradable since rapid degradation cannot be shown for all
constituents of the UVCB. Results on the biodegradation in sediment
provide evidence that these constituents will be ultimately degraded
under aerobic conditions with half-lives between 9.4 and 43 h for
p-cresol in water and between 5.9 and 11 h in water/sediment systems. In
so-called eco-cores, p-cresol degraded with half-lives between 3.0 and
16 h. In simulation studies with soil o-cresol degraded with half-live
times of 1.6 d for sandy loam and 5.1 d for sandy silt loam. m-cresol
degraded with half-live times of 0.6 d for sandy loam and 11.3 d for
sandy silt loam. Therefore, the substance has a low potential for
accumulation in soil and sediment.
Available data for all main components of Tar
acids, xylenol fraction (CAS 84989-06-0) demonstrate the log Kow to be
below 3. Thus, Tar acids, xylenol fraction (CAS 84989-06-0) exhibits a
low potential for bioaccumulation and in accordance with Regulation (EC)
No 1907/2006, Column 2 of Annex IX, section 9.3.2, a study on the
bioaccumulation in aquatic species does not need to be conducted.
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. Thus, Tar acids,
xylenol fraction (CAS 84989-06-0) exhibits low potential for adsorption.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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