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Physical & Chemical properties

Vapour pressure

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Description of key information

The vapour pressure of Alcohols, C9-11, branched and linear is estimated to be 1.3 Pa at 25°C.

Some constituents of this substance contain a single short-chain side-branch at the 2-position in the alkyl chain, which does not significantly affect the properties (‘essentially linear’). For chemical safety assessment, the properties of such constituents are read-across from the linear alcohol of the equivalent chain length.

Key value for chemical safety assessment

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

Additional information

The vapour pressure of 1.3 Pa at 25°C was determined by prediction based on the properties of the constituents.

The registration substance is a UVCB, so available data for the constituents are used for environmental exposure modelling on a chain length specific basis.

Nonanol has a reported vapour pressure value of 1.63 Pa at 25°C (Boublik et al., 1984) and 3 Pa at 25°C (Daubert and Danner, 1989); decanol has a reported vapour pressure value of 1.1 Pa at 25 °C (Daubert and Danner 1989) and undecanol has a reported vapour pressure value of 0.39 Pa at 25°C (Daubert and Danner 1989).

The quantified values at ambient temperature from Daubert and Danner are used in environmental modelling.

Discussion of trends in the Category of C6-24 linear and essentially-linear aliphatic alcohols:

As chain length increases, vapour pressure decreases. This is because molecular weight is higher and intermolecular forces in the substance are all higher.