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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:
9 February 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
other: ASTM D2879 - 97 (2007) Standard Test Method for Vapour Pressure-Temperature Relation ship and Initial Decomposition Temperature of Liquids by Isoteniscope.
Deviations:
yes
Remarks:
A digital electronic pressure gauge and not a mercury manometer (as stipulated in ASTM D2879 - 97 2007) was used for pressure measurement.
GLP compliance:
no
Type of method:
isoteniscope
Key result
Temp.:
20 °C
Vapour pressure:
< 0.75 mm Hg

 

Vapour Pressure at 20°C/

mm Hg

Run 1

< 0.75

Run 2

< 0.75

Run 3

< 0.75

Average

< 0.75

Conclusions:
A vapour pressure < 0.75 mmHg at 20°C was determined for 2-Propenoic acid, 2-methyl-, tetracosyl ester(branched).
Executive summary:

The ASTM D2879 - 97 Standard Test Method for Vapour Pressure-Temperature Relationship and Initial Decomposition Temperature of Liquids by Isoteniscope was followed to determine the vapour pressure of test substance 2-Propenoic acid, 2-methyl-, tetracosyl ester(branched). The test substance was determined to have a vapour pressure < 0.75 mmHg at 20°C based on three runs.

Description of key information

The ASTM D2879 - 97 Standard Test Method for Vapour Pressure-Temperature Relationship and Initial Decomposition Temperature of Liquids by Isoteniscope was followed to determine the vapour pressure of test substance 2-Propenoic acid, 2-methyl-, tetracosyl ester(branched). The test substance was determined to have a vapour pressure < 0.75 mmHg at 20°C based on three runs. This is equivalent to a vapour pressure < 100 Pa at 20°C.

Key value for chemical safety assessment

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

Additional information