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Physical & Chemical properties

Vapour pressure

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Description of key information

58.96 kPa, 20 °C, (static method, Amireche-Ziar)

71.60 kPa, 25 °C, (static method, Amireche-Ziar)

Key value for chemical safety assessment

Vapour pressure:
71.6 kPa
at the temperature of:
298.15 K

Additional information

Two well documented studies were selected from the available literature (see literature search). Both were in good agreement to within experimental error. Values were taken from the more recent study (Amireche-Ziar, 2008) which had been calculated for standard temperatures (T = 20, 25 °C) from the fitted data. Pressures for other temperatures can be easily calculated from the Antoine equation given by Ambrose (1972).

The available information is considered to be adequate for the purposes of classification and labelling and risk assessment, with no nearby regulatory cut-offs (at 50 °C the vapour pressure is significantly less than the definition for a gas). The study is very well documented, with all relevant experimental parameters addressed. The study was published in the peer reviewed literature, and is in good agreement with other workers. As a result, testing does not appear scientifically necessary based on the use of existing data and, given the above points, the criteria in Regulation (EC) No. 1907/2006, Annex XI, 1.1.1 are considered to be met.