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EC number: 231-272-0 | CAS number: 7473-98-5
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:
- 2009-2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- dynamic method
- Temp.:
- 20 °C
- Vapour pressure:
- 0.006 hPa
- Remarks on result:
- other: calculated
- Temp.:
- 25 °C
- Vapour pressure:
- 0.01 hPa
- Remarks on result:
- other: calculated
- Temp.:
- 50 °C
- Vapour pressure:
- 0.13 hPa
- Remarks on result:
- other: calculated
- Conclusions:
- The vapour pressure of the test substance was determined to be 0.0057 hPa at 20°C.
- Executive summary:
In this guideline (OECD 104) study conducted to GLP standards, the test material (EC 231-272-0) was determined to have a vapour pressure of 0.0057 hPa at 20°C
Reference
Results:
| Temperature (°C) | Vapour Pressure (hPa) | |
| Measurement | Calculation | |
| 65.90 | 0.46 | 0.483 |
| 75.56 | 1.00 | 0.979 |
| 85.82 | 2.00 | 1.946 |
| 92.38 | 2.99 | 2.930 |
| 101.24 | 4.99 | 4.922 |
| 107.47 | 6.99 | 6.941 |
| 114.36 | 9.97 | 9.961 |
| 138.19 | 29.97 | 30.450 |
| 150.63 | 49.98 | 50.880 |
| 169.16 | 99.65 | 101.545 |
| 190.03 | 199.67 | 202.180 |
| 203.44 | 299.74 | 301.565 |
| 221.84 | 499.79 | 498.550 |
| 235.03 | 699.71 | 693.242 |
| 250.49 | 1010.9 | 993.406 |
The regression of the results leads with a mean deviation of 1.60% to the following equation:
ln(p/hPa) = 15.90956 - 3626.61/(152.09 + t/°C)
Vapour pressures calculated from the regression equation:
| Temperature (°C) | Vapour Pressure (hPa) |
| 20 | 5.7 x 10-3 |
| 25 | 1.0 x 10-2 |
| 50 | 0.13 |
| 252.1 | 1013.25 |
Description of key information
Study conducted to recognised training guidelines with GLP
Key value for chemical safety assessment
- Vapour pressure:
- 0.006 hPa
- at the temperature of:
- 20 °C
Additional information
The vapour pressure was determined by dynamic method to be 0.0057 hPa at 20°C
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