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Vapour pressure

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Description of key information

No vapour pressure could be determined applying the static method due to the presence of substances with a very low vapour pressure and traces or  of highly volatile components, e.g. residues of solvents. Therefore, in a weight-of-evicence approach, calculated values with for typical 3 substances with the relatively highest concentration present in the substance are taken for assessment. These compounds represent about 56% of the organic part of the UVCB, and the addition of the partial pressures is considered to deliver a more realistic result than the measured values.

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
20 °C

Additional information

The following calculated values for the vapour pressure were used (20°C):

- Abietic acid, content ca. 6.5%: partial vapour pressure 1.2E-06 Pa

- Dehydroabietic acid, content ca. 40%: partial pressure 6.8E-06 Pa

- Fumarate adduct of acietic acid (=Fumaropimaric acid), content ca. 10%: partial vapour pressure 1.1E-11 Pa

It should be regognised that Ca and Mg of these acids are expected to have even lower vapour pressures due to their ionic structure.