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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

72-hour EC50 = 9.0 mg/l and NOEC = 1.1 mg/l

Key value for chemical safety assessment

EC50 for freshwater algae:
9 mg/L
EC10 or NOEC for freshwater algae:
1.1 mg/L

Additional information

Measured data were not available for the test substance. However, as the substance hydrolysis rapidly to diphenylsilanediol, data for the hydrolysis product was considered more relevant. A 72 -hour EC50value of 9 mg/l and NOEC of 1.1 mg/l (based on growth rate) have been determined for the effects of the test on growth rate of Selenastrum capricornutum (new name: Pseudokirchnerella subcapitata) based on mean measured concentrations of the test substance and according to OECD guideline 201 (Wildlife international ltd, 2004). This study is considered reliable and was selected as key. This was also supported by predicted a predicted EC50 of 8.6 mg/l based on an appropriate QSAR.