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EC number: 914-475-5 | CAS number: -
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 10 JUL 2009 to 09 SEP 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:
- 2 009
- Report date:
- 2009
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: vapour pressure balance
Test material
- Reference substance name:
- Reaction mass of Fatty acids, montan-wax and Fatty acids, montan-wax, ethylene esters and Montan wax
- EC Number:
- 914-475-5
- Molecular formula:
- R-CH2-COOR1OOC-CH2-R mainly
- IUPAC Name:
- Reaction mass of Fatty acids, montan-wax and Fatty acids, montan-wax, ethylene esters and Montan wax
- Details on test material:
- - Name of test material (as cited in study report): Licowax E
- Physical state: Solid (yellowish powder)
- Analytical purity: 99.6% (w/w)
- Storage condition of test material: Room temperature
Constituent 1
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 19 °C to 130 °C. Above 71 °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 |
70.6 |
2.5 x 10-5 |
71.8 |
2.8 x 10-5 |
80.9 |
6.6 x 10-5 |
88.1 |
6.1 x 10-5 |
91.0 |
1.1 x 10-4 |
96.3 |
1.5 x 10-4 |
101.6 |
2.3 x 10-4 |
109.6 |
4.1 x10-4 |
116.4 |
6.4 x 10-4 |
123.5 |
8.5 x 10-4 |
130.1 |
1.2 x 10-3 |
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 centigrade scale. 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 |
2,54E-07 |
A = 6,93571 |
25 |
4,28E-07 |
B = -3966,60 |
50 |
4,58E-06 |
C = 273,15 |
Final Results
Vapour Pressure
The calculated vapour pressure values are extrapolated:
T / °C |
p/hPa |
p / Pa |
20 |
2.5 x 10-7 |
2.5 x 10-5 |
25 |
4.3 x 10-7 |
4.3 x 10-5 |
50 |
4.6 x 10-6 |
4.6 x 10-4 |
Applicant's summary and conclusion
- Conclusions:
- The vapour pressure of the test substance is 0.000043 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 0.000043 Pa at 25 °C.
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