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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

Algal growth inhibition study, static, OECD 201 (HD4): NOEC > = 100 mg/l
EC50 (methylsilanetriol): 34 000 mg/l (QSAR)

Key value for chemical safety assessment

EC10 or NOEC for freshwater algae:
100 mg/L

Additional information

Toxicity to aquatic plants was studied in a valid algal growth inhibition study with Pseudokirchneriella subcapitata according to OECD 210 under GLP. Test concentrations ranged from 1 to 100 mg/l (nominal concentrations). Because of rapid hydrolys of the test substance, the stock solution was allowed to hydrolyse for 48 hours prior to test initiation under conditions that prevented evaporation of the test substance. No effect on algal growth parameters could be observed. Under the conditions of the test, the hydrolysis products of the test substance did not induce toxicity to algae. An EC50 could not be established, the NOEL is >= 100 mg/l.

An EC50 of 34 000 mg/l is calculated for the final hydrolysis product methylsilanetriol using an appropriate QSAR method (PFA 2013ag).