Alcohols, C18-22, distn. residues

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

2010-05-11

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Test procedure in accordance with national standard methods (ASTM)

Qualifier:

according to guideline

Guideline:

other: ASTM-D2879 Standard Test Method for Vapor Pressure-Temperature Relationship and Initial Decomposition Temperature of Liquids by Isoteniscope

Deviations:

no

GLP compliance:

no

Type of method:

isoteniscope

Temp.:

ca. 38

Vapour pressure:

< 0.001 hPa

Remarks on result:

other: measured at 100 °F

Measurement:

Vapor Pressure at 100°F: < 0.001 mm Hg

Conclusions:

Alcohols C18-22, distillation residues was determined according ASTM D 2879. The vapour pressure was determined to be < 0.001 mm Hg (=0.001 mBar) at 100°F (38 °C).

Description of key information

The vapour pressure was determined at seven different temperatures. 1/T was plotted against log P. The graph showed no linear correlation; therefore for the test item Alcohols, C18 -22, distn. residues, a regression equation could not be used for the calculation of vapour pressure at room temperature. This was attributed to the complex composition of the test item. It was expected, that the vapour pressure of the test item is < 3.69 x 10E-03 Pa at 20° and 25°C (value from measurement at 342.3 K, this value belongs to the compound with the lowest boiling point and corresponding vapour pressure). 

Additional information

Another determination of vapour pressure was performed according to ASTM-D2879 (Vapor Pressure-Temperature Relationship and Initial Decomposition Temperature of Liquids by Isoteniscope) with a measured value for vapour pressure < 0.001 mbar at 38°C.