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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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Physical & Chemical properties

Vapour pressure

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Description of key information

The vapour pressure of the substance is determined to be 38.5 hPa at 20 °C and 48.2 hPa at 25 °C.

Key value for chemical safety assessment

Vapour pressure:
38.5 hPa
at the temperature of:
20 °C

Additional information

Several reliable literature sources reported the vapour pressure of 1-dioxane to be in the same range. Crenshaw et al. and Gallaugher; Hibbert (cited in REAXYS) reported the vapour pressure to be 38.5 hPa at 20 °C and 48.2 hPa at 25 °C. The Syracuse Research Coperation, Physical Properties Database and the Hazardous Substances Data Bank reported the vapour pressure to be 50.8 hPa at 25 °C. The GESTIS - Substance database reported the vapour pressure to be 38.4 hPa at 20 °C and 159 hPa at 50 °C and Francesconi (cited in the Journal of Chemical and Engineering Data) reported it to be 47.5 hPa at 25 °C. This was supported by an elder measurement, done by BASF which resulted the vapour pressure to be 42.8 hPa at 23.1 °C

They are all peer reviewed and authoritative secondary sources and regarded to be reliable for 1-dioxane. The values from Crenshaw et al. and Gallaugher; Hibbert (cited in REAXYS) were chosen as key parameter for the vapour pressure.