Registration Dossier

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report Date:
2017

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
GLP compliance:
yes
Type of method:
effusion method: Knudsen cell

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
liquid: viscous
Specific details on test material used for the study:
Batch number: 78-242-15

Results and discussion

Vapour pressureopen allclose all
Test no.:
#1
Temp.:
35.3 °C
Vapour pressure:
0.056 Pa
Test no.:
#2
Temp.:
42.3 °C
Vapour pressure:
0.098 Pa
Test no.:
#3
Temp.:
49.5 °C
Vapour pressure:
0.131 Pa
Test no.:
#4
Temp.:
57 °C
Vapour pressure:
0.176 Pa
Test no.:
#5
Temp.:
66.6 °C
Vapour pressure:
0.301 Pa
Test no.:
#6
Temp.:
75.3 °C
Vapour pressure:
0.583 Pa
Test no.:
#7
Temp.:
84.1 °C
Vapour pressure:
0.838 Pa
Test no.:
#8
Temp.:
93 °C
Vapour pressure:
1.33 Pa
Test no.:
#9
Temp.:
102.2 °C
Vapour pressure:
2.21 Pa
Test no.:
#10
Temp.:
111.5 °C
Vapour pressure:
2.75 Pa

Any other information on results incl. tables

Since the analysis was conducted under high vacuum conditions, the heat could be transferred only by radiation, this caused a consistent difference between the furnace temperature and the sample one and a considerable time for the system to reach equilibrium.

The temperatures reported (registered by the thermocouple under the Knudsen cell) are hence different from the one set and the mass loss has been measured only in 80 minutes time interval within each isotherm, after the system had reached equilibrium.

Applicant's summary and conclusion

Conclusions:
The vapour pressure of the test item at 20°C is 0.0192 Pa (extrapolated value).