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Physical & Chemical properties

Vapour pressure

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Description of key information

Vapour pressure [2-(perfluorohexyl)ethyl]trimethoxysilane]: 13 Pa at 25°C (QSAR)
Vapour pressure [2-(perfluorohexyl)ethyl]silanetriol]: 6.9E-03 Pa at 25°C (QSAR)
Vapour pressure [methanol]: 12790 Pa at 20°C

Key value for chemical safety assessment

Vapour pressure:
13 Pa
at the temperature of:
25 °C

Additional information

A vapour pressure value of 13 Pa 25°C was determined for [2-(perfluorohexyl)ethyl]trimethoxysilane using a validated QSAR estimation method. The result is considered to be reliable.


Under dilute conditions in water, the submission substance hydrolyses rapidly to form [2-(perfluorohexyl)ethyl]silanetriol and methanol. The vapour pressure of the silanol hydrolysis product was predicted to be 6.9E-03 Pa at 25°C using a validated QSAR estimation method.


A measured vapour pressure of 12790 Pa at 20°C is available for methanol (OECD 2004).

OECD (2004): SIDS Initial Assessment Report for SIAM 19, Berlin, Germany, 18-20 October 2004, Methanol, CAS 67-56-1.