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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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