Registration Dossier
Registration Dossier
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EC number: 940-123-5 | CAS number: 866889-74-9
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
The vapour pressure of C16-18 DMAPA amidoamine is 3.4E-08 Pa at 20°C.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 20 °C
Additional information
C16-18 DMAPA amidoamine is a UVCB substance with variable chain length of the fatty acid moiety. Measured data are available for the main constituent of the registered substance:
The vapour pressure of Stearic acid 3-(dimethylaminopropyl)amide determined by the vapour pressure balance (effusion method) according to OECD guideline 104 (adopted 27 July 1995) and EU test method A.4 (30 May 2008) is reported to be 3.4E-08 Pa at 20°C.
This is supported by an estimation using ACD PhysChem software:As a worst case assumption, the vapour pressure of the mixture can be given as the vapour pressure of compound with the highest vapour pressure, the residual DMAPA (10 hPa). The concentration of DMAPA is below 15 ppm. All fatty acids and amid amines have estimated vapour pressures below 0.1 Pa. Therefore the product itself has a vapour pressure below 0.1 Pa at 20°C.
The following results from supporting substance is used for justification of read-across:
The vapour pressure of C20/22-alkyltrimethylammonium chloride at 20, 25 and 50 °C extrapolated from the data points in the temperature range 72 – 98 °C is 7.0E-07, 9.9E-07 and 4.8E-06, respectively.
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