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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
(Q)SAR
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model, but not (completely) falling into its applicability domain, with adequate and reliable documentation / justification
Qualifier:
according to
Guideline:
other: ECHA guidance on information requirements and chemical safety assessment Chapter R.6: QSARs and grouping of chemicals.
Type of method:
other:
Specific details on test material used for the study:
The QSAR model was applied to each component of the substance. Since the result from the QSAR test was similar we choose to use as a test material the most abundant component of the substance: 2-(2-chlorophenyl)-1-[2-(2-chlorophenyl)-4,5-diphenylimidazol-1-yl]-4,5-diphenylimidazole.
Fourthemore, the tre different constituents of the multi constituent substance present a common structural portion (comon moiety) rappresented by the component chosen as the rappresentative one. The resutls obained for aech constituent are attacced in the justification.
Key result
Test no.:
#1
Temp.:
25 °C
Vapour pressure:
0 mm Hg

The QSAR model was applied to each component of the substance. Since the result from the QSAR test was similar we choose to use as a test material the most abundant component of the substance: 2-(2-chlorophenyl)-1-[2-(2-chlorophenyl)-4,5-diphenylimidazol-1-yl]-4,5-diphenylimidazole.

Fourthemore, the tre different constituents of the multi constituent substance present a common structural portion (comon moiety) rappresented by the component chosen as the rappresentative one. The resutls obained for aech constituent are attacced in the justification.

Conclusions:
The QSAR model was applied to each component of the substance.
Since the result from the QSAR test was similar the value corresponding to the one of the most abundant component (ca.70%) of the substance was chosen as reference values.
The vapur pressior of the substance is predicted to be 3.95E-10 mmHg (at 25°C)

Description of key information

The vapur pressior of the substance is predicted to be 3.95E-10 mmHg (at 25°C), equal to 5.266E-8 Pa.

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
25 °C

Additional information