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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

Toxicity to microorganisms: 3hr EC50 >100 mg/l (activated sludge respiration inhibition, OECD 209) for read-across substance trichloro(vinyl)silane.

Key value for chemical safety assessment

Additional information

No reliable data are available for the toxicity to microorganisms of trichloro(ethyl)silane. A toxicity to microorganisms study is, however, available for the related substance trichloro(vinyl)silane. It is considered appropriate to read across the toxicity to microorganisms result for trichloro(vinyl)silane because it is considered a close structural analogue of trichloro(ethyl)silane. Both trichloro(ethyl)silane and trichloro(vinyl)silane will hydrolyse rapidly under conditions relevant to microbial toxicity assessment, to similar hydrolysis products, ethylsilanetriol and vinylsilanetriol, respectively. The other hydrolysis product is HCl. Effects of hydrogen chloride on microorganisms are limited to those that result from changes to pH in unbuffered media.