Registration Dossier

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
from 12 April 2016 to 13 April 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:
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 (incl. certificate)
Type of method:
effusion method: isothermal thermogravimetry

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Details on test material:
- Appearance: yellow/brown powder
- Storage conditions: in refrigerator (2-8°C)
Specific details on test material used for the study:
reaction and/or decomposition at > 225°C

Results and discussion

Vapour pressureopen allclose all
Key result
Temp.:
25 °C
Vapour pressure:
< 0 Pa
Key result
Temp.:
20 °C
Vapour pressure:
< 0 Pa

Any other information on results incl. tables

From the start of the study untill ca. 150 minutes a weight loss was observed due to evaporation of impurities in the substance.

The log PT versus 1/T (T in K) curve for the substance over the range 170 -200°C showed poor linearity (correlation coefficient r < 0.99). Extrapolation of the curve to 20°C or 25°C would not give reliable results.

Since the weight losses of the test item at 170°C, 180°C, 190°C and 200°C were lower than the weight losses of chrysene at the same temperatures, it was concluded that the vapour pressure of the substance at 20°C (25°C) is lower than the vapour pressure of chrysene at 20°C (25°C).

Applicant's summary and conclusion

Conclusions:
The vapour pressure of the substance at 25°C was determined to be < 2.0E-06 Pa.
The vapour pressure of the substance at 20°C was determined to be < 8.4E-07 Pa.
Executive summary:

The vapour pressure of the substance was determined using the isothermal thermogravimetric effusion method in a GLP study according to EC A.4, OECD 104 and OPPTS 830.7950. The vapour pressure of the substance at 20°C (25°C) could not be determined by aid of a log pT vs 1/T curve. From the measured weight losses, the vapour pressure of the substance was concluded to be lower than the vapour pressure of reference substance Chrysene at 20°C (25°C). The vapour pressure of the substance at 25°C was determined to be < 2.0E-06 Pa. The vapour pressure of the substance at 20°C was determined to be < 8.4E-07 Pa.