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Vapour pressure

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Description of key information

0.000000000053 Pa at 20 'C
0.00000000014 Pa at 25'C
0.000000013 Pa 50'C

Key value for chemical safety assessment

Additional information

Individual Results

 

Thermal Stability

The DSC-measurement in a closed glass crucible with the test item showed and endothermic effect in the temperature range 200 – 230 ‘C directly followed by an exothermic effect in the temperature range 230 – 340 ‘C and a second exothermic effect in the temperature range 350 – 435 ‘C with an overall energy of 330 J/g.

A graphical presentation of the DSC run No. 27734 is given on page 8 (figure 1) of the study.

 

Vapour Pressure Balance (Effusion Method)

The vapour pressure was measure in the temperature range of 35 ‘C to 150 ‘C. Above 138 ‘C a vapour pressure could be measured. The measure vapour pressure at the corresponding temperatures are listed in the following table:

  Temperature / 'C  Vapour pressure / hPa 
  138.0  0.000015 
  138.2  0.000015 
  143.5  0.000019 
  148.1  0.000039 
  150.2  0.000054 

The figure 2 on page 9 of the study gives the vapour pressure (logarithmic scale) as a function of the inverse temperature (1/T, T in Kelvin). Only for better readability the temperature is reported in a centigrade scale. The values for 20, 25, and 50 'C are calculated, using the Antoine constants A, B and C as shown there.

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