Docosan-1-ol

Vapour pressure

Link to relevant study record(s)

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.:

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.