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EC number: 700-717-5
CAS number: -
Hydrolysis half-life at pH 4, 7 and 9: very rapid (much less than the cut-off value of 12 hours).
study is available for MS-Silane. However, a reliable study equivalent
to OECD 111 is available for dichloro(dimethyl) silane which makes up 20
-35% of MS-Silane. This substance is fully hydrolyzed within a few
minutes at pH 4, 7 and 9 at 1.5°C. This is also the case for other
chlorosilanes for which measured data are available. Therefore, it can
be concluded that the submission substance will hydrolyze rapidly under
environmentally relevant conditions and no further testing is necessary.
For example, the
initial hydrolysis equation for dichlorosilane is expected to be as
→ Me2Si(H)(OH)2+ 2HCl
However, the Si-H
bond may also be unstable with respect to hydrolysis over a longer
timescale; the expected hydrolysis product is methylsilanetriol.
Condensation reactions to give siloxane dimers, oligomers and polymers
may also occur. A
similar reaction process should occur for all chlorinated constituents
with the production of silanols, ethylsilanols, or methylsilanols.
The following information is taken into
account for any hazard / risk / persistency assessment:
half-life at pH 4, 7 and 9: very rapid (much less than the cut-off value
of 12 hours).
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.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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