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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Physical & Chemical properties

Partition coefficient

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Administrative data

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Description of key information

Log Kow: -1.4, -0.2 and 0.3 at 20°C for propylsilanetriol, and dimer and trimer of propylsilanetriol, respectively.

Key value for chemical safety assessment

Additional information

The requirement to conduct a log Kow study for the submission substance is waived. The study would be technically difficult because the substance is salt that is only stable in aqueous solution at high pH (>14).

In solution at pH 7 and low concentration (conditions relevant for the environment), propylsilanetriol will predominate. A log Kow value of -1.4 was determined for propylsilanetriol using a validated QSAR estimation method. Under certain conditions, the dimer and trimer of propylsilanetriol may be formed. Log Kow values of -0.2 and 0.3 were predicted for the dimer and trimer respectively using a validated QSAR estimation method. The potassium salt of propylsilanetriol will behave no differently to the parent silanol under equivalent conditions of concentration and pH.