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Physical & Chemical properties

Vapour pressure

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Description of key information

Various hydrocarbon acidic structures predominant in naphthenic acids were estimated for vapour pressure using the EPISuite computer model (US EPA, 2009).

Key value for chemical safety assessment

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

Additional information

Values obtained ranged from 0.15 x 10 E-4 to 9.5 x 10 E-4 Pa at 25°C. The vapour pressure of Naphthenic acids can be concluded to be < 0.001 Pa at 25°C.