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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

The distributionin 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/rapid hydrolysis of triethoxy(3-isocyanatopropyl)silane and its intermediate hydrolysis product, 3-aminopropyltriethoxysilane,the distribution calculation is done for the final silanol hydrolysis product (3-aminopropylsilanetriol).

Table. Distribution modelling for STP





Fraction of emission directed to water by STP




Fraction of emission directed to air by STP




Fraction of emission directed to sludge by STP




Fraction of the emission degraded in STP




Triethoxy(3-isocyanatopropyl)silane in contact with water hydrolyses vey rapidly to 3-aminopropylsilanetriol, ethanol and carbon dioxide. 3-Aminopropylsilanetriol is not expected to undergo any significant biodegradation, has low Henry’s Law constant and low log Kow/log Koc. Therefore water is the main compartment to which it is expected to partition.