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Vapour pressure

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Description of key information

Vapour pressure: 0.000000101 Pa at 25°C (QSAR)

Key value for chemical safety assessment

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

Additional information

The vapour pressure of the substance betaines, C12-14 (even numbered)-alkyldimethyl was calculated for the individual constituents: betaine, C12-alkyldimethyl, and betaine, C14-alkyldimethyl by using Episuite (MPBPWIN v1.43), modified Grain method, which is the method recommended for solids. The vapour pressure was determined to be1.01E-07 Pa for C12-Betaine and 2.57E-08 Pa for C14-Betaine; therefore, the higher value was chosen to represent the vapour pressure for the UVCB-substance. The recommended experimental methods are only suited to determine vapour pressures starting from 10E-04 Pa. Therefore, determination by QSAR is an acceptable alternative for this substance.