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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
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Guideline study, to GLP.
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Qualifier:
according to
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: vapour pressure balance
Specific details on test material used for the study:
Commercial name: DIMETOL (as reported in the report):
Chemical nature: 2,6-dimethylheptan-2-ol
Empirical formula: C9H20O
Molecular weight: 144.2 g/mol
CAS number: 13254-34-7
Stability: stable in acetonitrile and in the mobile phase
Batch: 003046
Purity: 99.1% (GC)
Density: 0.813 g/mL at 20°C
Key result
Temp.:
20 °C
Vapour pressure:
18.5 Pa
Remarks on result:
other: 17 - 20 Pa
Temp.:
25 °C
Vapour pressure:
38 Pa
Remarks on result:
other: 35 - 41 Pa
Conclusions:
The isothermal TGA effusion method was applied for the determination of the vapour pressure of Dimetol.
The vapour pressure of the test substance was 18.5 Pa (17-20 Pa) at 20°C (293K) and 38 Pa (35 - 41 Pa) at 25°C (298K).

Description of key information

The isothermal TGA effusion method was applied for the determination of the vapour pressure of Dimetol designed to be compatible with Method A4 Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 104 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.

Key value for chemical safety assessment

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

Additional information

Mean of the two reported values, which were 17 Pa (obtained with experiment 1 and 3) and 20 Pa (obtained with experiment 2 and 3).