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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2010-01-13
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods with acceptable restrictions
Remarks:
Test procedure in accordance with national standard methods (ASTM) without GLP.
Qualifier:
according to guideline
Guideline:
other: ASTM D 2879
Deviations:
no
GLP compliance:
no
Type of method:
isoteniscope
Key result
Test no.:
#1
Temp.:
38 °C
Vapour pressure:
< 0.001 mBar
Remarks on result:
other: measured 100 °F

Measurement

Vapor Pressure at 100°F: <0.001 mm Hg

Conclusions:
A vapour pressure value of <0.001 mBar (<0.1 Pa) at 38°C was determined for the substance using a relevant test method. The result is considered to be reliable.
Executive summary:

Icosan-1 -ol was determined according ASTM D 2879. The vapour pressure was determined to be <0.001mBar at 100 °F (38°C).

Description of key information

The vapour pressure of a commercial sample of icosan-1-ol is < 1E-3 mBar (equivalent to < 0.1 Pa) at 38°C. A quantitative value of 1.5E-05 Pa at 25°C is available for the pure alcohol from a reliable reference source (Daubert and Danner, 1989).

Key value for chemical safety assessment

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

Additional information

A vapour pressure value of <1.0E-03 mBar (<0.1 Pa) at ca. 38°C was determined for icosan-1-ol with the use of an isoteniscope method in accordance with ASTM D 2879. The result is considered to be reliable.

It is supported by a value of 1.5E-05 Pa at 25°C, taken from a reliable reference source (Daubert and Danner, 1989).

The quantified value at ambient temperature from Daubert and Danner is 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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