Registration Dossier
Registration Dossier
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EC number: 204-506-4 | CAS number: 121-91-5
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
Based on a mathematical relationship between temperature and vapour pressure for isophthalic acid (IPA), derived from published VP measurements at various temperatures, the VP of IPA at 25 degrees C is estimated to be 0.000000024 mm Hg (equivalent to 0.00000320 Pa).
In addition, the vapour pressure of isophthalic acid was estimated using the MPBPVP v1.43 QSAR model available from the US EPA. The predicted vapour pressure of isophthalic acid is 0.00000347 Pa at 25 degrees C (Modified Grain method). The model prediction is in close agreement with the estimate extrapolated from measured vapour pressures.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
The vapour pressure estimate for isophthalic acid is very low, compared to standard atmospheric pressure and IPA is therefore not likely to volatilise to the atmosphere.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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