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Vapour pressure

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Description of key information

The vapour pressure is < 2.13E-3 Pa at 25 °C.

Key value for chemical safety assessment

Additional information

The value for vapour pressure is based on a weight of evidence using data for the substance itself and its constitutents (from C12 to C18 even numbered fatty acids).

C12 Lauric acid (CAS 143-07-7) had the highest vapour pressure of these consitutents (see explanation below).

According to the theoretical principle of Raoult’s law, the vapour pressure of a mixture is equal to the mole-fraction-weighted sum of the components' vapour pressures:

ptot= ∑ pixi

The vapour pressure of the mixture should be lower than the vapour pressure of the component which has the highest vapour pressure in its pure form (C12).