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Physical & Chemical properties

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:
other: ASTM D 2879
Deviations:
no
GLP compliance:
no
Type of method:
isoteniscope
Key result
Test no.:
#1
Temp.:
ca. 38 °C
Vapour pressure:
< 0.001 mBar
Remarks on result:
other: 100 °F measured

Measurement

Vapor Pressure at 100°F:<0.001 mm Hg

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

Docosan-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 docosan-1-ol is < 0.001 mBar (equivalent to < 0.1 Pa) at 38°C. A quantitative estimate has been made of the vapour pressure of the pure alcohol, validated by reliable data across the homologous series.

This QSAR estimated value is 2.4E-06 Pa at 25°C, using the MPBPVP software from EPI Web 4.0 (2009).

Key value for chemical safety assessment

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

Additional information

A vapour pressure value of <0.001 mBar (<0.1 Pa) at 38°C was determined for docosan-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 QSAR estimated value of 2.4E-06 Pa at 25°C, using the MPBPVP software from EPI Web 4.0 (2009).

The quantified QSAR estimate at ambient temperature 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.