Registration Dossier
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EC number: 212-298-1 | CAS number: 778-94-9
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 11 Feb - 23 Feb 2022
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 022
- Report date:
- 2022
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- GLP certifying authority: Hessisches Ministerium für Umwelt, Klimaschutz, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany
- Type of method:
- effusion method: Knudsen cell
Test material
- Reference substance name:
- 2-nitro-4-(trifluoromethyl)benzonitrile
- EC Number:
- 212-298-1
- EC Name:
- 2-nitro-4-(trifluoromethyl)benzonitrile
- Cas Number:
- 778-94-9
- Molecular formula:
- C8H3F3N2O2
- IUPAC Name:
- 2-nitro-4-(trifluoromethyl)benzonitrile
Constituent 1
Results and discussion
Vapour pressureopen allclose all
- Temp.:
- 20 °C
- Vapour pressure:
- 0.09 Pa
- Remarks on result:
- other: interpolated from the experimental data (vapour pressure: Knudsen cell method)
- Temp.:
- 25 °C
- Vapour pressure:
- 0.16 Pa
- Remarks on result:
- other: interpolated from the experimental data (vapour pressure: Knudsen cell method)
- Temp.:
- 50 °C
- Vapour pressure:
- 2.12 Pa
- Remarks on result:
- other: extrapolated from the experimental data (vapour pressure: Knudsen cell method)
Any other information on results incl. tables
Individual results
The vapour pressure was measured in the temperature range of 14 °C to 39 °C. The measured vapour pressures values together with the measured temperatures are listed in the Table below.
| No. | Temperature / °C | Evaporation rate / kg/s | Vapour Pressure /hPa |
| 1 | 14.5 | 8.14 x 10-10 | 4.56 x 10-2 |
| 2 | 19.5 | 1.51 x 10-9 | 8.51 x 10-2 |
| 3 | 24.5 | 2.50 x 10-9 | 1.42 x 10-1 |
| 4 | 29.5 | 4.81 x 10-9 | 2.76 x 10-1 |
| 5 | 34.4 | 8.07 x 10-9 | 4.67 x 10-1 |
| 6 | 39.3 | 1.18 x 10-8 | 6.90 x 10-1 |
From the measured data the parameters A, B and C of the Antoine equation can be derived by regression.
log p = A + (B/ (C +ϑ))
The evaluated Antoine parameters are listed in the Table below.
| A | 13.7684 |
| B | -4343.65 |
| C | 273.15 |
The vapour pressure values for 20, 25 and 50 °C (see Table below) were interpolated (values at 25 °C and 50 °C) and extrapolated (value at 20 °C), using these Antoine constants A, B and C.
| T /°C | p /Pa |
| 20 | 0.09 |
| 25 | 0.16 |
| 50 | 2.12 |
Applicant's summary and conclusion
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