Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

Reliable acute toxicity tests results are available for freshwater fish (Brachydanio rerio), invertebrates (Daphnia magna) and algae (Scenedesmus subspicatus) for the substance 3-trimethoxysilylpropyl methacrylate. The relevant short-term key and supporting values are:

Fish: LC50 (96 h): >100 mg/l and >1042 mg/l; NOEC: =100 mg/l and =1042 mg/l

Daphnia: EC50 (48 h): >100 mg/ l and >876 mg/l; NOEC: =100 mg/l and =876 mg/l

Algae: EC50 (72 h): >1000 mg/l and >536 mg/l; NOEC: =100 mg/l and 322 mg/l

An activated sludge respiration inhibition 3 hour EC50 value of >1000 mg/l and NOEC value of =1000 mg/l (nominal) were determined in a reliable study.

The rapid hydrolysis of 3-trimethoxysilylpropyl methacrylate (half-life of 1.87 h at pH 7 and 20°C) means it is likely that the test organisms in each test were exposed primarily to the hydrolysis products of the substance, 3-(trihydroxysilyl)propyl methacrylate and methanol.