Registration Dossier
Registration Dossier
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EC number: 204-399-4 | CAS number: 120-47-8
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
Ethylparaben: 0.0127 Pa at 25°C (calculated)
Methylparaben: 0.000028 Pa at 20°C (measured)
Propylparaben: 0.00034 Pa at 20°C (measured)
Key value for chemical safety assessment
- Vapour pressure:
- 0.013 Pa
- at the temperature of:
- 25 °C
Additional information
The vapour pressur was calculated using MPBWIN v1.43 as part of EPISuite v4.00 using measured melting and boiling points as input parameters. The vapour pressure at 25°C was determined to be 0.0127 Pa by using a modified Grain method.
Measured data are related for the shorter and longer chain homologue derivatives Methyl- and Propylparaben. Both measured values were determined in guideline studies partially following GLP procedures. The measured data of the homologue derivatives are less than the calculated vapour pressure of Ethylparaben itself. A measured value of Ethylparaben would be expected to lie between the two measured values of the homologues. Thus, the calculated vapour pressure can be assumed as a worse case assumption and was therefore used as the key parameter for chemical safety assessment.
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