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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

A 48-hour EC50 of >117 mg/l has been determined for the effects of a read-across substance (Dimethylsilanediol; CAS No. 1066-42-8) on mobility of Daphnia magna.

Key value for chemical safety assessment

Additional information

No data for short-term toxicity to invertebrates are available for dichloro(dimethyl)silane. However studies of short-term toxicity to invertebrates are available for the related substance dimethylsilanediol. Dichloro(dimethyl)silane, CAS 75-78-5, hydrolyses to dimethylsilanediol, CAS 1066-42-8. The hydrolysis half-live of dichloro(dimethyl)silane (half-life <<1 min at pH 7 and 25°C) indicates that, under conditions relevant to ecotoxicity assessment, the substance will hydrolyse to dimethylsilanediol. The other hydrolysis product is hydrogen chloride; the properties of this substance is well characterised. Effects of hydrogen chloride on aquatic organisms are limited to those that result from changes to pH in unbuffered media and are discussed in the endpoint summary: ecotoxological discussion, consideration of the non-silanol hydrolysis product.