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EC number: 225-805-6
CAS number: 5089-70-3
A toxicity to aquatic algae test
will be conducted with the parent substance,
(3-chloropropyl)triethoxysilane (CAS 5089-70-3, EC 225-805-6), in which
the exposure to the parent substance will be maximised. This test will
be conducted in order to fulfil the aquatic Annex X data requirements
for the parent substance.
A supporting study reported a
72-hour ErC50 value of >819 mg/l and a NOErC
value of 237 mg/l (nominal) for the effects of
(3-chloropropyl)triethoxysilane (CAS 5089-70-3, EC 225-805-6) on the
growth rate of Scenedesmus subspicatus (new name: Desmodesmus
subspicatus) (Evonik, 1993). The study was conducted under EU Method
C.3 and in compliance with GLP. In view of the moderate hydrolysis
rate of the tested substance (35 hours at pH 7 and 25°C), test
media preparation method (18-hour stir-time) and exposure regime
(static), it is likely that the test organisms were exposed to a mixture
of the parent substance and hydrolysis products initially, and
predominantly to the hydrolysis products by the end of the study.
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