Registration Dossier

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
10 JUN 2009 to 09 JUL 2009
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Guideline study (OECD 104)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2009
Report Date:
2009

Materials and methods

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

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): Licowax OP
- Physical state: Solid (light yellow flakes)
- Analytical purity: 100% (w/w)
- Storage condition of test material: Room temperature

Results and discussion

Vapour pressure
Temp.:
25 °C
Vapour pressure:
0 Pa

Any other information on results incl. tables

The vapour pressure was measured in the temperature range of 22 °C to 93 °C. Above 47 °C a vapour pressure could be measured. The measured vapour pressures at the corresponding temperatures are listed in the following table:

Temperature / °C

Vapour pressure / hPa

47.0

8.5 x 10-6

49.9

1.1 x 10-5

54.3

1.4 x 10-5

57.5

2.3 x 10-5

61.3

3.5 x 10-5

64.0

4.3 x 10-5

70.5

8.2 x 10-5

75.8

1.3 x 10-4

81.3

2.1 x 10-4

85.6

2.7 x 10-4

93.2

4.0 x 10 -4

A curve is shown that gives the vapour pressure (Iogarithmic scale) as a function of the inverse temperature (1/T, T in Kelvin). For better readability the temperature is reported in a centigradescale. The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C.

T / °C

p/ hPa

log (p/hPa) = A + B/(C+T[°C])

20

4.36E-07

A = 8.86553

25

7.85E-07

B = -4463.46

50

1.13E-05

C = 273.15

 Final Results

Vapour Pressure

The calculated vapour pressure values are extrapolated:

T / °C

p / hPa

p / Pa

20

4.4 x 10-7

4.4 x 10-5

25

7.9 x 10-7

7.9 x 10-5

50

1.1 x 10-5

1.1 x 10-3


Applicant's summary and conclusion

Conclusions:
The vapour pressure of the test substance is 0.000079 Pa at 25 °C.
Executive summary:

The vapour pressure of the test substance was determined in a guideline study (OECD TG 104). The vapour pressure is 0.000079 Pa at 25 °C.