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Physical & Chemical properties

Vapour pressure

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Description of key information

The vapour pressure of terephthalic acid was estimated using the QSAR model MPBPVP v.1.43 of the US EPA.  The definitive value selected by the model is the estimate of 0.00158 Pa calculated according to the Modified Grain method.  
Based on a mathematical relationship between temperature and vapour pressure for TPA, derived from published VP measurements at temperatures in the range 100 to 250 degrees C, the vapour pressure of TPA at 25 degrees C is estimated to be 0.0000000000259 mm Hg.

Key value for chemical safety assessment

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

Additional information

The vapour pressure estimate for terephthalic acid is very low, compared to standard atmospheric pressure and TPA is therefore not likely to volatilise to the atmosphere.