Registration Dossier
Registration Dossier
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EC number: 273-054-8 | CAS number: 68937-17-7
Short-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
Dimethylsilanediol:
A 96-hour LC50 of >126 mg/L has been determined for the effects of dimethylsilanediol on mortality of Oncorhynchus mykiss.
Methylsilanetriol:
A 96-hour LC50 value of >500 mg/l and NOEC of ≥500 mg/l (nominal concentration) have been determined for the effects of a read-across substance, triethoxy(methyl)silane, on mortality of Brachydanio rerio.
Key value for chemical safety assessment
Additional information
No test data for short-term toxicity to fish are available fordisilane, chloro Me derivs.Disilane, chloro Me derivs.is expected to hydrolyse rapidly in contact with water to give hydrogen chloride and, initially,the silanol derivatives of the three main constituents, and further hydrolyse to methylsilanetriol and dimethylsilanediol.
Effects of hydrogen chloride on aquatic organisms are limited to those that result from changes to pH in unbuffered media.
Short-term toxicity to fish data are available for dimethylsilanediol. For methylsilanetriol, data have been read-across from the related substance triethoxy(methyl)silane. Under conditions relevant to ecotoxicity assessment this will hydrolyse to methylsilanetriol in the course of the tests. The other hydrolysis product, ethanol, is non-toxic to the environment and it is considered unlikely that its presence significantly affected the results of the test performed with triethoxy(methyl)silane.Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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