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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

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'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenyl-2'H-1,2'-biimidazole
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)