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EC number: 815-305-1 | CAS number: 138938-64-4
Vapour pressure
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).
Reference:
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)
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