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Physical & Chemical properties

Vapour pressure

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Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
11 January 2012- 25 April 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: The study has been performed according to OECD and EC guidelines and according to the principles of GLP.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2012
Report Date:
2012

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
(2009)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
(2006)
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Version / remarks:
(1996)
Deviations:
no
GLP compliance:
yes
Type of method:
effusion method: by loss of weight or by trapping vaporisate
Remarks:
(Isothermal thermogravimetric effusion method)

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
Name of test material (as cited in study report): Paz-E
Substance type: mono-constituent
Physical state: white powder
Expiration date of the lot/batch: 25 November 2012
Storage condition of test material: At room temperature protected from light in desiccator (sample is hygroscopic)
Stability under test conditions: Stable

Results and discussion

Vapour pressureopen allclose all
Temp.:
20 °C
Vapour pressure:
< 1.3 other: *10^-8 Pa
Remarks on result:
other: <1.0*10^-10 mm Hg
Temp.:
25 °C
Vapour pressure:
< 1.6 other: *10^-8 Pa
Remarks on result:
other: < 1.2*10-^10 mm Hg

Any other information on results incl. tables

The weight loss of the test substance at 210°C, 220°C, 230°C and 240°C was lower than the weight loss of benzo(ghi)perylene at the same temperatures. From this it was concluded that the vapour pressure of Paz-E was lower than the vapour pressure of benzo(ghi)perylene.

Representative weight loss curves of the test substance and benzo(ghi)perylene are shown in Figures 10 and 11 (see attachment).

Applicant's summary and conclusion

Conclusions:
The vapour pressure of Paz-E at 20°C is < 1.3 x 10^-8 Pa
The vapour pressure of Paz-E at 25°C is < 1.6 x 10^-8 Pa