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EC number: 700-790-3
CAS number: -
GLS-Silane is a UVCB comprised of 4 silanes
and 4 hydrocarbons. Dichloro(methyl)silane is the most
prevalent substance and accounts for >20-<40% w/w of
GLS-Silane. Chloro(dimethyl)silane and trichlorosilane make up >10-<20%
and >5 -<15% of GLS-Silane respectively. The silane
constituents of GLS-Silane are not biodegradable in water and comprise
about 75% of the GLS-Silane. Therefore, GLS-Silane is not predicted to
be biodegradable in water. Hydrolysis is expected to be the predominant
breakdown pathway for these constituents. No
hydrolysis study is available for the GLS-Silane. However, a reliable
study equivalent to OECD 111 is available for dichloro(dimethyl)silane.
This substance is fully hydrolyzed within a few minutes at pH 4, 7 and 9
and 1.5°C. This is also the case for other chlorosilanes for which
measured data are available.
Chlorosilanes in general exhibit rapid
hydrolysis due to the size of the silica atom and the nature of the bond. Therefore,
the environmental fate properties of the silanols will be discussed as
exposure to the environment to the hydrolysis products rather than the
parent substance. The environmental properties of HCL will not be
discussed as it will be buffered to various extents, dependent on the
buffering capacity of different compartments in the environment. The
predicted environmental concentrations of HCL indicate that the
buffering capacity of the environment is sufficient. At
pH 7 it is found as water and the chloride ion, which do not need to be
Tetramethylsilane comprises >10 - < 30% of
the GLS-Silane and does not undergo hydrolysis. The 4
hydrocarbons (isobutane, butane, chloromethane, and 2 -methylbutane)
account for the remaining 0 -16% of GLS-Silane with 2-methylbutane being
the predominant hydrocarbon at >3 - <10% w/w. Isobutane, butane, and
chloromethane are liquified gases.
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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