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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

(72-h) EC50: 437 mg/L growth rate Desmodesmus subspicatus (read-across from CAS 13501-76-3)
NOEC: circa.: 57 mg/L growth rate Desmodesmus subspicatus (read-across from CAS 13501-76-3)

Key value for chemical safety assessment

EC50 for freshwater algae:
437 mg/L
EC10 or NOEC for freshwater algae:
57 mg/L

Additional information

There are no data for the substance. However a 72-hour EC50 value of 437 mg/l and NOEC of approximately 57 mg/l have been determined for the effects the structurally-analogous read-across substance (3-chloropropyl)diethoxymethylsilane (CAS 13501-76-3) on growth rate of Desmodesmus subspicatus (tested as Scenedesmus subspicatus). The results are interpreted with reference to nominal concentrations of the test substance.However it is likely that the test organisms were predominantly exposed to the hydrolysis products of the substance during the study, and not the parent compound. This is because the substance hydrolyses in water, as indicated by the DOC concentrations in the stock solution. In addition, the test media preparation included a stirring period of 18 h and the exposure regime was static.

The study is considered to be reliability 1 (reliable without restrictions); however the read across of the results is considered to be reliability 2 (reliable with restrictions).