Registration Dossier
Registration Dossier
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EC number: 288-284-4 | CAS number: 85711-26-8
Vapour pressure
Administrative data
Link to relevant study record(s)
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.
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