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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:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Qualifier:
equivalent or similar to guideline
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
GLP compliance:
yes (incl. QA statement)
Type of method:
dynamic method
Temp.:
20 °C
Vapour pressure:
0.313 Pa
Remarks on result:
other: extrapolated value
Temp.:
25 °C
Vapour pressure:
0.603 Pa
Remarks on result:
other: extrapolated value
Temp.:
50 °C
Vapour pressure:
9.43 Pa
Remarks on result:
other: extrapolated value

Above 140 °C the test item started to discolour. At the end of the measurement it had dicoloured from brownish-yellow to dark brown-black. For this reason the measured vapour pressure above 207.1 °C where not taken into account for the final result.

Conclusions:
The following extrapolated values wer determined from the experimental data gained from the vapour pressure dynamic method:
20°C: 0.313 Pa
25°C: 0.603 Pa
50°C: 9.43 Pa
Executive summary:

The vapour pressure was measured according to the European Commission Council Regulation (EC) No. 440/2008, Annex, Part A, A.4 and OECD Test Guideline 104 with the dynamic method in the temperature range of 117 °C to 240 °C.

After filling the apparatus with the test item the lowest desired pressure is set and the heating system is switched on. The temperature is measured by a resistance thermometer. Equilibrium is reached when a constant boiling temperature is achieved at a given pressure. After recording this point the pressure is increased step by step and if possible up to

the boiling point.

The following extrapolated values wer determined from the experimental data gained from the vapour pressure dynamic method: 20°C: 0.313 Pa, 25°C: 0.603 Pa, 50°C: 9.43 Pa.

Description of key information

The vapour pressure was measured according to the European Commission Council Regulation (EC) No. 440/2008, Annex, Part A, A.4 and OECD Test Guideline 104 with the dynamic method in the temperature range of 117 °C to 240 °C.

After filling the apparatus with the test item the lowest desired pressure is set and the heating system is switched on. The temperature is measured by a resistance thermometer. Equilibrium is reached when a constant boiling temperature is achieved at a given pressure. After recording this point the pressure is increased step by step and if possible up to

the boiling point.

The following extrapolated values wer determined from the experimental data gained from the vapour pressure dynamic method: 20°C: 0.313 Pa, 25°C: 0.603 Pa, 50°C: 9.43 Pa.

Key value for chemical safety assessment

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

Additional information