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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Sediment toxicity

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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