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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:
Start date of the experimental work: 23 August 2018 and Completion date of the experimental work: 31 October 2018.
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 (incl. QA statement)
Type of method:
static method
Key result
Temp.:
20 °C
Vapour pressure:
2.43 Pa
Remarks on result:
other: (mean of runs 2 & 3)

Full Test results:

 Temp /°C Temp / K  P / mbar  **P /Pa 
          Run 1
 *20  283.15 0.05  5 
 20.1  293.25 0.0419  4.19 
 29.9  303.05 0.1202  12.02 
 39.8  312.95 0.2527  25.27 
 49.9  323.05 0.4111  41.11 
          Run 2
 *20  293.15 0.03  3 
 20.0  293.15 0.0339  3.39 
 30.0  303.15 0.0611  6.11 
 39.8  312.95 0.1211  12.11
 49.8  322.95 0.2403  24.03 
          Run 3
 20.1  293.25 0.0147  1.47
 29.8  302.95 0.0443  4.43 
 39.6  312.75 0.1055  10.55 
 49.7  322.85 0.195  19.5 

* : Determined by extrapolation.

** : Calculated.

Comments

Run 1 - 14.4 g of sample used. Upon application of vacuum vigorous outgassing was observed. Total degas time approximately 16 hours. Vacuum at start of analysis was 0.0012 mbar.

 

Run 2 - 15.6 g of sample used. Upon application of vacuum vigorous outgassing was observed. Total degas time approximately 21 hours. Vacuum at start of analysis was 0.0011 mbar.

 

Run 3 - 15.8 g of sample used. Upon application of vacuum vigorous outgassing was observed. After 67 hours degassing the starting vacuum was 0.0011 mbar.

 

Degas time of Run 1 is suspected to have been insufficient therefore the result is reported as the mean of Runs 2 and 3.

Conclusions:
The Vapour pressure was determined to be 2.43 Pa at 20°C.
Executive summary:

The test is conducted to determine the vapour pressure of a test substance by the Static method.

The test is conducted in accordance with the procedure described in EU Regulation (EC) 440/2008, Annex Part A test A.4.

The Vapour pressure was determined to be 2.43 Pa at 20°C.

Description of key information

The test is conducted to determine the vapour pressure of a test substance by the Static method.

The test is conducted in accordance with the procedure described in EU Regulation (EC) 440/2008, Annex Part A test A.4.

The Vapour pressure was determined to be 2.43 Pa at 20°C.

Key value for chemical safety assessment

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

Additional information