Registration Dossier
Registration Dossier
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EC number: 931-288-4 | CAS number: -
Sediment toxicity
Administrative data
Link to relevant study record(s)
Description of key information
According to section 1 of Reach Annex XI, performing of a test is scientifically unjustified. Reach guidance document R7b states that a log Pow should be used as a trigger value for assessing sediment toxicity. For the substance, a log Kow of 6.11 was calculated. However, the substance hydrolyses rapidly to either oligomeric or polymeric ureas. The ureas are insoluble in water and therefore not bioavailable.
For the risk characterisation of the sediment compartment, a PNEC sediment has been derived on the basis of the equilibrium partition theory from aquatic toxicity data. As the risk characterisation yields a PEC/PNEC ratio smaller than 1, a test towards sediment dwelling organisms is not necessary as the risk towards the sediment compartment is sufficiently described based on the already available data.
Key value for chemical safety assessment
Additional information
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.
