Registration Dossier
Registration Dossier
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EC number: 219-787-9 | CAS number: 2530-87-2
Endpoint summary
Administrative data
Description of key information
Additional information
The distribution in a sewage treatment plant (STP) has been estimated using the SimpleTreat model (implemented in EUSES 2.1.2/Chesar 3.5), see table below. Although the registered substance hydrolyses rapidly in contact with water, the distribution calculation is done for all assessment entities.
Table: Distribution modelling for STP
|
(3-Chloropropyl)trimethoxysilane |
(3-Chloropropyl)silanetriol |
Methanol |
Unit |
Fraction of emission directed to water by STP |
96.10 |
99.96 |
12.62 |
[%] |
Fraction of emission directed to air by STP |
2.488 |
1.62E-7 |
0.095 |
[%] |
Fraction of emission directed to sludge by STP |
1.408 |
0.035 |
0.037 |
[%] |
Fraction of the emission degraded in STP |
0 |
0 |
87.24 |
[%] |
(3-Chloropropyl)trimethoxysilane hydrolyses rapidly to (3-chloropropyl)silanetriol and methanol. Methanol is readily biodegradable. (3-Chloropropyl)silanetriol is not expected to undergo any significant biodegradation, and is predicted to have very low Henry’s Law constant and low log Kow/log Koc. Distribution modelling for STP indicates that water is the main compartment to which both the parent substance and the silanol hydrolysis product are expected to partition in a sewage treatment plant. Water is also likely to be the main compartment to which (3-chloropropyl)silanetriol will partition in the wider environment following hydrolysis of the parent substance.
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