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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Vapour pressure

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Description of key information

1.52E-12 Pa at 25°C (Modified Grain Method; Episuite v4.11, MPBMWIN v 1.43)

Key value for chemical safety assessment

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

Additional information

The expected value of vapour pressure for the pure substance cannot be measured due to residual content of solvent (water) which results in a higher solvent vapour pressure than test substance vapour pressure. The residual content of solvent cannot be reduced below the limit of measurement with reasonable effort. Instead, a calculation is provided.

The vapour pressure of Undecylenamidopropyl Betaine was calculated to be 1.52E-12 Pa at 25°C, 3.85E-11 Pa at 40°C and 4.83E-7 Pa at 95°C (Modified Grain Method; Episuite v4.11, MPBMWIN v 1.43). However, the lowest value accepted by IUCLID was 1E-09 Pa.