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Vapour pressure

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Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
The value is the extrapolated value at ambient temperature based on peer-reviewed raw vapour pressure data across a broad range of temperatures. The reference source is a well-known and reliable source of critically-reviewed vapour pressure data, which cites the original source of the data.
Principles of method if other than guideline:
No details are available on the guideline used to determine this result.
GLP compliance:
not specified
Temp.:
25 °C
Vapour pressure:
0.049 Pa
Transition / decomposition:
no

The value at 25ºC is determined using the Antoine Equation by applying three standard coefficients for use in that equation, derived by Boublik et al. from reliable raw data.

Conclusions:
A vapour pressure value of 0.0493 Pa at 25ºC was reported in a collection of reliable data which has been subject to peer-review and in which the original data sources are traceable. The result is considered to be reliable.
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Value obtained from a recognised source of physico-chemical data. This reference is considered as definitive for vapour pressure values.
Principles of method if other than guideline:
No details are available on the guideline used to determine this result.
GLP compliance:
no
Temp.:
25 °C
Vapour pressure:
0.001 hPa
Transition / decomposition:
no
Conclusions:
A vapour pressure value of 0.113 Pa at 25ºC was reported in a collection of reliable data which has been subject to peer-review and in which the original data sources are traceable. The result is considered to be reliable.
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2009-09-10
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: 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
Temp.:
ca. 38 °C
Vapour pressure:
ca. 0.038 mBar
Remarks on result:
other: temperature measured: 100 °F

Measurement

Vapor Pressure at 100°F (Calculated): 0.0286 mm Hg

Conclusions:
A vapour pressure value of 0.038 mBar at 38°C was obtained for the substance using a relevant test method. The result is considered reliable
Executive summary:

Dodecan-1 -ol was determined according ASTM D 2879. The density was determined to be 0.0286mm Hg (=0.038 mBar) at 100°F (38 °C).

Endpoint:
vapour pressure
Adequacy of study:
supporting study
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: Data obtained from a secondary source
Temp.:
20 °C
Vapour pressure:
0.009 hPa

Description of key information

The vapour pressure of a commercial sample of dodecan-1-ol is 0.038 mBar (3.8 Pa) at 38°C. It is supported by a consistent and reliable measurement of 0.11 Pa at 25°C using a highly pure sample (Daubert and Danner, 1989).

Key value for chemical safety assessment

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

Additional information

The vapour pressure of 3.8 Pa at 38°C was determined for dodecan-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 consistent and reliable measurement of 0.11 Pa at 25°C using a highly pure sample (Daubert and Danner, 1989). A value of 0.0493 Pa at 25°C, taken from a reliable reference source (Boublik et al., 1984) is also available.

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.