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Vapour pressure

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Description of key information

The reported vapour pressure of the xylene isomers and ethylbenzene at 20˚C range from 650-944 Pa. The vapour pressure of m-xylene is 820 Pa, for o-xylene is 650 Pa, for p-xylene is 870 Pa, and for ethylbenzene it is 944 Pa. The mean value of 821 Pa will be used for the risk assessment.

Key value for chemical safety assessment

Vapour pressure:
821 Pa
at the temperature of:
20 °C

Additional information

Data was taken from Zwolinski and Wilhoit (1971) which is a peer reviewed handbook and so can be considered reliable and suitable for use as the key study for this endpoint. The data are supported by results from the CRC Handbook (Lide 2008), with vapour pressures for m-xylene, o-xylene, p-xylene and ethylbenzene of 1 kPa at 23.4˚C, 1 kPa at 27°C, 1 kPa at 22.4°C and 1 kPa at 21.1°C respectively.