Registration Dossier
Registration Dossier
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EC number: 239-415-9 | CAS number: 15396-00-6
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. Due to the very rapid hydrolysis (half-life = 4.88 minutes at pH 7 and 20°C) of 3-(trimethoxysilyl)propyl isocyanate, and the rapid hydrolysis (half-life = 2.6 hours at pH 7 and 20-25°C) of its intermediate hydrolysis product, 3-(trimethoxysilyl)propylamine, the distribution calculation is done for the final hydrolysis products, 3-aminopropylsilanetriol and methanol.
Table: Distribution modelling for STP
3-Aminopropylsilanetriol |
Methanol |
Unit | |
Fraction of emission directed to water by STP |
99.99 |
12.62 |
[%] |
Fraction of emission directed to air by STP |
4.66E-11 |
0.095 |
[%] |
Fraction of emission directed to sludge by STP |
3.13E-3 |
0.037 |
[%] |
Fraction of the emission degraded in STP |
0 |
87.24 |
[%] |
3-Aminopropylsilanetriol is not expected to undergo any significant biodegradation and is predicted to have low Henry’s Law constant and low log Kow/log Koc. Therefore water is the main compartment to which it is expected to partition in a sewage treatment plant. Water is also likely to be the main compartment to which 3-aminopropylsilanetriol is expected to partition in the wider environment.
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