Registration Dossier
Registration Dossier
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EC number: 221-906-4 | CAS number: 3277-26-7
Biodegradation in water and sediment: simulation tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: sediment simulation testing
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- other:
- Transformation products:
- no
- Endpoint:
- biodegradation in water: simulation testing on ultimate degradation in surface water
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- other:
- Transformation products:
- no
Referenceopen allclose all
Description of key information
Key value for chemical safety assessment
Additional information
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 environment is low (see Section 9 for further details).
- The substance and its intermediate hydrolysis products are unstable. The registered substance will hydrolyse rapidly in contact with water. The intermediate hydrolysis product is dimethylsilanol and the ultimate hydrolysis product is dimethylsilanediol. The risk characterisation ratios (RCRs) for the aquatic and sediment compartment, even with the conservative assumption that the silanol hydrolysis product is not biodegradable, are <1
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.
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