Registration Dossier

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2-17 Feb 2011
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Guideline study (OECD TG 104)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2011
Report Date:
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)
Type of method:
effusion method: vapour pressure balance

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
Test item: C-Wax Type E SZ 18
Purity: 99.5-100% (w/w)

Results and discussion

Vapour pressureopen allclose all
Temp.:
50 °C
Vapour pressure:
0.001 Pa
Temp.:
25 °C
Vapour pressure:
0 Pa

Any other information on results incl. tables

The vapour pressure was measured in the temperature range of 18 °C to 121 °C. Above 42 °C a vapour pressure was measured. The test item melted during the test. Values between 64 °C and 81 °C show deviations which are presumably caused by the melting process and were therefore excluded from the evaluation.

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

T / °C

p / hPa

log (p/hPa) = A + B/(C+T[°C])

20

5.02E-07

A = 5.82562

25

8.02E-07

B = -3554.43

50

6.70E-06

C = 273.15

Applicant's summary and conclusion

Conclusions:
The test substance has a vapour pressure of 8.0 x 10E-5 Pa at 25 °C.
Executive summary:

The vapour pressure of the test substance was measured in a guideline study (EU A.4; OECD TG 104) with a vapour pressure balance (effusion method). The test substance has a vapour pressure of 8.0 x 10E-5 Pa at 25 °C.