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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Administrative data

Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

Additional information

Testing is waived on the basis that the chemical safety assessment according to REACH Annex I indicates that it is not necessary to conduct the simulation test on ultimate degradation in surface water and the sediment simulation test, or to identify degradation products.        

Simulation tests (water and sediments) are not considered necessary because:

          The substance is used under highly controlled conditions and, therefore, exposure of the aquatic and sediment environments is low

          The substance hydrolyses rapidly and the silanol hydrolysis product has a low log Kowvalue and, therefore, exposure of the sediment compartment is expected to be low.

  • The risk characterisation ratios (RCRs) for the aquatic and sediment compartments,based on the assumption that the silanol hydrolysis product is not biodegradable, are <1.