Registration Dossier
Registration Dossier
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EC number: 246-377-7 | CAS number: 24636-31-5
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Hazard for air
Hazard for terrestrial organisms
Hazard for predators
Additional information
Conclusion on classification
The substance has reliable short-term E(L)C50 values of 0.573 mg/l in invertebrates and 20.2 mg/l in algae based on geometric mean measured concentration of the hydrolysis products, sum of 3-[hydroxy(dimethyl)silyl]propyl methacrylate (monomeric silanol) and 1,1,3,3-tetramethyldisiloxane-1,3-diyl)dipropane-1,3-diyl dimethacrylate (CAS 18547-93-8, EC 242-419-3) (siloxane dimer)). It has reliable ErC10 of 4.78 mg/l in algae.
The substance hydrolyses rapidly in water and the silanol hydrolysis product is not expected to be readily biodegradable based on read-across data.
These data are consistent with the following classification under Regulation (EC) No 1272/2008 (as amended) (CLP):
Acute toxicity: Category Acute 1 (M-factor 1)
Chronic toxicity: Category Chronic 1 (M-factor 1)
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