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EC number: 201-251-0
CAS number: 80-10-4
No rate constant or definative t1/2
determined due to rapidity of hydrolysis (sparse data points for 20-70%
hydrolysed). Upper limit t1/2 estimated (assuming first hydrolysis step
is rate-limiting). Observation of stable[Cl-] was used to estimate t1/2;
assumed 10 half-lives = exhaustive hydrolysis.
half-life in water: 10 seconds at pH 7 and 1.5°C
The test substance hydrolyses very rapidly. The half-life of the
test substance was reported to be 6 seconds at pH 4, 10 seconds at pH 7
and 8 seconds at pH 9 (Dow Corning, 2001). This study was conducted
according to a standard guideline and is considered reliable for
assessment. The hydrolysis products are diphenylsilanediol and
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