Registration Dossier
Registration Dossier
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EC number: 213-773-6 | CAS number: 1009-93-4
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
Vapour pressure (2,2,4,4,6,6-hexamethylcyclotrisilazane): 35 Pa at 25°C (QSAR)
Vapour pressure (dimethylsilanediol): 7 Pa at 25°C (QSAR)
Vapour pressure (ammonia): 861100 Pa at 20°C
Key value for chemical safety assessment
- Vapour pressure:
- 35 Pa
- at the temperature of:
- 25 °C
Additional information
A predicted vapour pressure value of 35 Pa at 25°C was determined for the substance using a validated QSAR estimation method. The result is considered to be reliable.
In contact with water, 2,2,4,4,6,6-hexamethylcyclotrisilazane reacts very rapidly to produce dimethylsilanediol and ammonia/ammonium as products of hydrolysis. The vapour pressure of the silanol hydrolysis product, dimethylsilanediol is predicted to be 7 Pa at 25°C using a validated QSAR estimation method.
Ammonia has a reported vapour pressure of 861100 Pa at 20°C (OECD 2007).
Reference:
OECD (2007). SIDS Initial Assessment Report for SIAM 24, Paris, France, 17-20 April 2007, Ammonia Category.
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