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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:
24th April 2015 - 29th April 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
yes
Type of method:
static method
Key result
Temp.:
ca. 20 °C
Vapour pressure:
ca. 6 Pa
Remarks on result:
other: Mean of runs 1 & 2

Full Test results:

 Temp / °C  Temp / K  P / mbar  **P / Pa
          Run 1
 *20  293.15  0.06 6 
 19.4  292.55 0.0511   5.11
 29.7  302.85 0.3752   37.52
 40.6  313.75 2.3   230
 49.4  322.55  11.6  1160
          Run 2
 *20  293.15  0.06  6
 20.1  293.25  0.0576  5.76
 28.2  301.35 0.35   35
 39.2  312.35 2.1   210
 47.9  321.05 11.9   1190

* - Determined by interpolation

** - Calculated

Comments:

Sample is suspected to be solvent wet. Although moisture content analysis revealed < 0.2%, the nature of the solvent is unknown. Solvent properties must therefore be considered when interpreting the result as volatile impurities may significantly affect the vapour pressure result. Approximately 10 g of material was used.

Conclusions:
Result : 6.0 Pa at 20°C (mean of runs 1 & 2)
Executive summary:

The test is conducted to determine the vapour pressure of a test substance by the Static method – using a U-tube manometer.

The static method involves placing a sample in a bulb maintained at constant temperature and connected to a pressure monitor and a vacuum pump. The method is suitable for multi-component systems. Results are subject to only slight errors for sample containing non-volatile impurities. The recommended range is 10 to 105 Pa.

The test is conducted in accordance with the procedure described in EU Regulation (EC) 440/2008, Annex Part A test A4.

Result : 6.0 Pa at 20°C (mean of runs 1 & 2)

Description of key information

The test is conducted to determine the vapour pressure of a test substance by the Static method – using a U-tube manometer.

The static method involves placing a sample in a bulb maintained at constant temperature and connected to a pressure monitor and a vacuum pump. The method is suitable for multi-component systems. Results are subject to only slight errors for sample containing non-volatile impurities. The recommended range is 10 to 105Pa.

The test is conducted in accordance with the procedure described in EU Regulation (EC) 440/2008, Annex Part A test A4.

Result : 6.0 Pa at 20°C (mean of runs 1 & 2)

Key value for chemical safety assessment

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

Additional information