Registration Dossier
Registration Dossier
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EC number: 800-984-9 | CAS number: 1428547-35-6
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
The vapour pressure of the substance at 20°C is below 0.0079 Pa, read across from C16 -18(sat+unsat)alkyl amine
Key value for chemical safety assessment
- Vapour pressure:
- 0.008 Pa
- at the temperature of:
- 20 °C
Additional information
The determination of the vapour pressure of Fatty acids, C16-18, compds. with C16-18-alkyl amines is based on a read-across from the vapour pressure of a C-chain pure dodecan-1-amine and for Oleylamine which has been analysed according to the OECD Guidelines for the Testing of Chemicals, No 104 "Vapour Pressure", by the gas saturation method. LCMS was used for the quantification. Since the major constituents of the substance Fatty acids, C16-18, compds. with C16-18-alkyl amines are C12 and higher (>99%) and the C18 content is typically >60% the value for the vapour pressure of oleylamine can be used for as worst case for the key value of the chemical safety assessment.
As a worst case, the vapour pressure is read across from a substance with lower carbon chain distribution from the primary fatty amine category.
In C16-18-alkyl amines, the n-alkyl part of the molecule has the length of either 16 or 18 carbon atoms. In Fatty acids, C16-18, compds. with C16-18-alkyl amines the chain lengths vary between 32 and 36 carbon atoms. Since the vapour pressure increases with decreasing hydrophobia in a specific homologue, it is considered as a worst case to read across from a substance with lower carbon chain distribution.
Therefore the vapour pressure of Fatty acids, C16-18, compds. with C16-18-alkyl amines is deemed to be =< 7.9 x 10^-3 Pa
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