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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
Study period:
2014-05-23 to 2014-05-30
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP Guideline study
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: vapour pressure balance
Temp.:
25 °C
Vapour pressure:
0.009 Pa
Temp.:
70 °C
Vapour pressure:
0.015 Pa
Transition / decomposition:
no
Conclusions:
The vapour pressure was found to be 9.1E-03 Pa at 25 ºC and 1.5E-02 Pa at 70 ºC
Executive summary:

Test Guidance

The vapour pressure was determined using a vapour pressure balance with measurements being made at several temperatures. Testing was conducted using a procedure designed to be compatible with Method A4 Vapour Pressure of Commission Regulation (EC) No 440/2208 of 30 May 2008 and Method 104 of the OECD Guidelines for Testing of Chemicals, 23 March 2006.

Method

The vapour pressure was determined using a vapour pressure balance. The temperature of the sample was controlled electronically. The mass and temperature readings were recorded automatically into a computer file.

A preliminary run was undertaken over the temperature range 20°C to 85°C to provide information for a suitable temperature range for the determination.

25°C Determination

A sequence of runs was started after a sample of test item had been under vacuum for approximately 17.5 hours. Temperature and pressure readings were taken between 20°C and 30°C with a one hour dwell at 20°C between runs.

70°C Determination

A further sequence of runs was started after a sample of test item had been under vacuum for approximately 91.25 hours. Temperature and pressure readings were taken between 65°C and 75°C with a one hour dwell at 65°C between runs.

Result

No decomposition was observed.

The vapour pressure was found to be 9.1E-03 Pa at 25 ºC and 1.5E-02 Pa at 70 ºC

Description of key information

The vapour pressure was found to be 9.1E-03 Pa at 25 ºC and 1.5E-02 Pa at 70 ºC

Key value for chemical safety assessment

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

Additional information

The vapour pressure was found to be 9.1E-03 Pa at 25 ºC and 1.5E-02 Pa at 70 ºC