Registration Dossier

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2011
Reliability:
1 (reliable without restriction)
Justification for type of information:
The vapour pressure of the test substance (PT) was determined by the isothermal thermogravimetric
effusion method. The method is validated in the range 10-8 - 103 Pa using a set of five reference
substances with known vapour pressures . The validity of the method was
verified maximum one month before this study using hexachlorobenzene (>99%, Fluka Chemie,
Buchs, Switzerland) as reference control substance. The logarithm of the evaporation rate at 20°C (log
vT, 20) deviated < 10% from the average value obtained during the validation test. From this, it was
possible to apply the constants obtained with the validation test for the determination of the vapour
pressure of the test substance.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2011

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: isothermal thermogravimetry

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: flakes

Results and discussion

Vapour pressureopen allclose all
Key result
Test no.:
#1
Temp.:
ca. 20 °C
Vapour pressure:
ca. 0.017 Pa
Key result
Test no.:
#2
Temp.:
ca. 25 °C
Vapour pressure:
ca. 0.031 Pa

Applicant's summary and conclusion

Conclusions:
The vapour pressure of the test substance was :
- at 20°C (293K) : 1.7.10-2 Pa
- at 25°C (298K) : 3.1. 10-2 Pa