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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

72-h EC50 value of >913 mg/l and NOEC of ≥913 mg/l, S. subspicatus, (read-across)

Key value for chemical safety assessment

Additional information

There are no data for the registered substance. However, a 72-hour EC50 value of >913 mg/l and NOEC of 913 mg/l have been determined for the effects of the structurally analogous read-across substance, trimethoxypropylsilane (CAS 1067 -25 -0), on growth rate of Scenedesmus subspicatus (new name: Desmodesmus subspicatus) based on nominal concentrations of the substance. The result was obtained under static exposure conditions and it is likely that the test organisms were predominantly exposed to the hydrolysis products of the substance; propylsilanetriol and methanol.

An EC50 value of >100 mg/l has been obtained for propylsilanetriol using an appropriate calculation method (ECOSAR v.1.11).