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EC number: 266-096-3 | CAS number: 66063-05-6
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2008-08-07 to 2008-11-07
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 2006
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- effusion method: vapour pressure balance
- Key result
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Key result
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Key result
- Vapour pressure:
- 0 Pa
- Remarks on result:
- not determinable
- Conclusions:
- Vapour pressure is 4.0 x 10-7 pa at 20°C
Reference
Vapour Pressure Balance (Effusion Method)
The vapour pressure was measured in the temperature range of 28°C to 123°C. Above 72°C areasonable vapour pressure could be measured. The measured vapour pressures at thecorresponding temperatures are listed in the following table:
Temperature / oc | Vapour pressure / hPa |
72.4 | 8.3 x 10-6 |
76.3 | 1.2 x 10-5 |
81.0 | 2.1 x 10-5 |
87.8 | 4.6 x 10-5 |
94.0 | 1 x 10-4 |
100.0 | 2.1 x 10-4 |
105.1 | 3.7 x 10-4 |
112.4 | 7.0 x 10-4 |
120.6 | 1.4 x 10-3 |
123.0 | 1.7 x 10-3 |
The figure 2 gives the logarithm of the vapour pressure as a function of the inversetemperature (1/T, T in Kelvin). Only 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 as shown there
Final Results
Vapour Pressure
The following vapour pressure values for Pencycuron (pure substance) were extrapolated from theexperimental data:
| p /hPa | p/ Pa |
20 | 4.0 x 10-9 | 4.0 x 10-7 |
25 | 9.3 x 10-9 | 9.3vx 10-7 |
50 | 4.2 10-7 | 4.2 x 10-5 |
Description of key information
Vapour pressure is 4.0 x 10-7 Pa at 20°C
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 20 °C
Additional information
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Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
