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Physical & Chemical properties

Vapour pressure

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Description of key information

The vapour pressure of the substance is 3.9 hPa at 20°C

Key value for chemical safety assessment

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

Additional information

The vapour pressure of propionic acid as result from 2 experimental studies from BASF resulted to be between 3,99 hPa at 23 °C and 8.06 hPa at 34.5°C. Also a literature review was conducted. In a weight of evidence approach all values were evaluated.

The GESTIS database reports the vapour pressure to be 3.99 hPa at 23°C, REAXYS reports the vapour pressure to be 5.2 hpa at 25 °C and the Knovel Solvents - A Properties Database reports the vapour pressure to be 3.9 hPa at 20°C.

All results regarded to be reliable for propionic acid. The value which originates from the Knovel Solvents - A Properties Database described the vapour pressure at 20 °C therefore it was choosen as key value for the vapour pressure.