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Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
10 April 2017 to 08 May 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
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
GLP compliance:
yes
Type of method:
effusion method: isothermal thermogravimetry

Test material

Constituent 1
Chemical structure
Reference substance name:
2-(2-chlorophenyl)-1-[2-(2-chlorophenyl)-4,5-diphenyl-2H-imidazol-2-yl]-4,5-diphenyl-1H-imidazole
EC Number:
230-555-6
EC Name:
2-(2-chlorophenyl)-1-[2-(2-chlorophenyl)-4,5-diphenyl-2H-imidazol-2-yl]-4,5-diphenyl-1H-imidazole
Cas Number:
7189-82-4
Molecular formula:
C42H28Cl2N4
IUPAC Name:
2-(2-chlorophenyl)-1-[2-(2-chlorophenyl)-4,5-diphenyl-2H-imidazol-2-yl]-4,5-diphenyl-1H-imidazole
Test material form:
solid: crystalline
Details on test material:
Appearance: Yellow crystalline powder
Test item storage: At room temperature
Stable under storage conditions until: 01 February 2018 (expiry date)

Results and discussion

Vapour pressureopen allclose all
Key result
Temp.:
20 °C
Vapour pressure:
< 0 Pa
Remarks on result:
other:
Remarks:
based on weight loss over 160-190 °C that was less than the weight loss of chrysene over the same temperature interval
Key result
Temp.:
25 °C
Vapour pressure:
< 0 Pa
Remarks on result:
other:
Remarks:
based on weight loss over 160-190 °C that was less than the weight loss of chrysene over the same temperature interval

Any other information on results incl. tables

From the weight loss over the 160 -190 °C, a log p versus1/T curve with a coefficient of correlation (r) of > 0.99 could not be obtained. The observed weight losses were non-linear and after the experiments a discolouration of the substance was observed, indicating reaction and/or decomposition.

Therefore the weight loss was compared with the weight loss of the reference substance chrysene over the same temperature interval.

Applicant's summary and conclusion

Conclusions:
The vapour pressure of the substance at 20 °C is < 8.4E-07 Pa
Executive summary:

In a test using the isothermal thermogravimetric effusion method, the vapor pressure of the substance was obtained by measuring weight loss over a temperature interval between 160 -190°C. A log pversus1/T curve with a coefficient of correlation (r) of > 0.99 could not be obtained. The observed weight losses were non-linear and after the experiments a discolouration of the substance was observed, indicating reaction and/or decomposition.

Therefore the weight loss was compared with the weight loss of the reference substance chrysene over the same temperature interval. The vapour pressure at 20 °C is < 8.4E-07 Pa (smaller than the vapour pressure of chrysene)