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EC number: 239-311-3
CAS number: 15267-95-5
its hydrolysis product chloromethylsilanetriol
contain no chromophores that would
absorb visible or UV radiation, so direct photolysis is not likely to be
significant. Indirect photolysis resulting from gas-phase reaction with
photochemically-produced hydroxyl radicals may occur.
The SRC AOPWIN program (v1.92) has been used
to obtain values of the rate constant kOH for reaction of (chloromethyl)triethoxysilane
and its hydrolysis product chloromethylsilanetriol
with hydroxyl radicals. This
prediction method has not been validated to assess applicability to
silanes and silanols; therefore, the obtained values should be treated
The overall half-life in air under default
conditions of hydroxyl radical concentration was calculated using the
sec) x OH Concair(molecules/cm3)
x 24 x 3600
= ln 2/ kdegair(d-1)
total rate constant for degradation in air
rate constant for reaction with hydroxyl radicals
concentration of hydroxyl radicals in air = 5 x 105OH
The results are given in table below:
Table 4.1.2. Results of calculated photodegradation in air.
kOH(cm3/ molecule. sec)
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