Registration Dossier

Diss Factsheets

Physical & Chemical properties

Vapour pressure

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Vapour pressure [1-(tert-butyldimethylsilyl)piperazine]: 3.2 Pa at 25°C (QSAR)

Vapour pressure [tert-butyldimethylsilanol]: 64 Pa at 25°C (QSAR)

Vapour pressure [piperazine]: 21 Pa at 20°C

Key value for chemical safety assessment

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

Additional information

A vapour pressure value of 3.2 Pa at 25°C was predicted for the substance using a validated QSAR estimation method. The result is considered to be reliable.

In contact with water, the substance undergoes very rapid hydrolysis to form tert-butyldimethylsilanol and piperazine.

The vapour pressure of the silanol hydrolysis product, tert-butyldimethylsilanol has been predicted to be 64 Pa at 25°C using the same validated QSAR estimation method as the parent substance.

Piperazine has a reported vapour pressure of 21 Pa at 20°C (Kirk-Othmer 1978).


Kirk-Othmer (1978). Kirk-Othmer Encyclopedia of Chemical Technology. 3rd ed., Volumes 1-26. New York, NY: John Wiley and Sons, 1978-1984., p. V2: 296 (1978)