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EC number: 806-509-1
CAS number: 1393571-42-0
waiver, study considered scientifically unjustified
In accordance with Column 2 adaptation statement of REACH Annex IX,
information requirement section 7.16, this study does not need to be
conducted since the dissociation constant is not considered critical
owing the poor water solubility of this UVCB substance (0.000000032 mg/L
). Indeed, in view of the difficulties associated with the evaluation of
aquatic toxicity of poorly water soluble complex UVCB substances in
order to assess the ecotoxicological parameters to fish, Daphnia and to
algae of this substance Water Accommodated Fractions (WAF) were
necessary in order to ensure that the organisms were sufficiently
exposed. In addition, for the assessment of ready biodegradability,
ultrasonification was required owing to poor water solubility of the
substance and an attempt was made to evaluate the hydrolysis of the
substance as a consequence of pH but this was not feasible owing to the
poor water solubility.
Consequently, as regards the dissociation constant it is considered that
this study is scientifically unjustified; no dissociation is to be
expected under naturally relevant pH conditions.
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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