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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Study period:
2010-01-28
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Justification for type of information:
See section 13.2 for the read-across justification.
Reason / purpose for cross-reference:
read-across source
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
no
Type of method:
gas saturation method
Temp.:
20 °C
Vapour pressure:
0.001 Pa
Remarks on result:
other: The vapour pressure was measured at three different temperatures in order to extrapolate to 20°C
Temp.:
25 °C
Vapour pressure:
0.001
Remarks on result:
other: The vapour pressure was measured at three different temperatures in order to extrapolate to 25°C
Conclusions:
The vapour pressure of the test substance has been determined to 0.73 mPa at 20°C and 1.2 mPa at 25°C.
Executive summary:

The vapour pressure of the test substance has been determined to be 0.73 mPa at 20 °C and 1.2 mPa at 25 °C for Ethanol, 2,2'-iminobis-, N-C12-18-alkyl derivs. (PFAEO C12-18). Since the source substance is a substance with the same structure but a shorter alkyl chain length and a lower molecular weight, these data are used as a worst case value for Octadecylbi(2-hydroxyethyl)amine (PFAEO C18).

Description of key information

The vapour pressure of the test substance has been determined to be 0.73 mPa at 20 °C and 1.2 mPa at 25 °C for Ethanol, 2,2'-iminobis-, N-C12-18-alkyl derivs. (PFAEO C12-18). Since the source substance is a substance with the same structure but a shorter alkyl chain length and a lower molecular weight, these data are used as a worst case value for Octadecylbi(2-hydroxyethyl)amine (PFAEO C18).


 


The vapour pressure of the test substance has been determined to 0.73 mPa at 20°C and 1.2 mPa at 25°C.

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
20 °C

Additional information

As a worst case, the vapour pressure is read across from a substance with lower carbon chain distribution within the Primary Fatty Amine Ethoxylated (PFAEO) category. Since the vapour pressure increase with decreasing hydrophobe in a specific homologue, it is a worst case to read across from a substance with lower carbon chain distribution. A value at higher temperature has been estimated using linear regression and the constants obtained from measure data.