Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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 distribution in a sewage treatment plant (STP) has been estimated using the SimpleTreat model (implemented in EUSES 2.1.2/Chesar 3), see table below. Due to the very rapid hydrolysis of trichloro(propyl)silane, the distribution calculation is done for the silanol hydrolysis product, propylsilanetriol.

Table: Distribution modelling for STP (CHECK CHESAR TO CONFIRM VALUES)

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



Trichloro(propyl)silane hydrolyses very rapidly to propylsilanetriol and hydrochloric acid. Biodegradation is not relevant for hydrochloric acid being inorganic. Propylsilanetriol is not expected to undergo any significant biodegradation, and is predicted to have low Henry’s Law constant and low log Kow/log Koc. Distribution modelling for STP indicates that 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 propylsilanetriol will partition in the wider environment.