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EC number: 951-458-1 | CAS number: -
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:
- 20 February 2020 - 30 Jul 2020
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- March 04, 2016
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- March 23, 2006
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: isothermal thermogravimetry
- Specific details on test material used for the study:
- Physical Description: Light orange liquid
Purity/Composition: UVCB
Storage Conditions: At room temperature protected from light
Purity/Composition correction factor: No correction factor required
Test item handling: Use amber glassware or wrap container in aluminum foil
Chemical name: 2,2-bis[({3-[methyl(phenyl)amino]propanoyl}oxy)methyl]butyl 3-[methyl(phenyl)amino]propanoate - Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Conclusions:
- The isothermal TGA effusion method was applied for the determination of the vapour pressure of C894
The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:
[Pa] [mm Hg]
20 °C 5.4E-8 4.1E-10
25 °C 1.2E-7 9.3E-10 - Executive summary:
Information Guideline(s) Result Comment Vapour pressure EC A.4 20°C: 5.4 x 10-8Pa = isothermal TGA effusion method 4.1 x 10-10mm Hg OECD 104 25°C: 1.2 x 10-7Pa = 9.3 x 10-10mm Hg
Reference
A representative weight loss curve of the test item is shown in Figure 4 (attached image). The results of the isothermal TGA analysis for the test item and the vapour pressure at 20°C and 25°C are given in Table 3 and Table 4 (below).
The vapour pressure regression curve of the log PT of the test item as function of the reciprocal temperatures is shown in Figure 5 (in attached backrground material).
The equation of the curve was: log PT = -6323 x 1/T + 14.30 (r = 0.995, n = 6).
Results of the Vapour pressure Isothermal TGA Analysis
| Temperature | Weight loss | νT | log νT | log PT | PT |
| [°C] | [µg/min] | [g/cm2/h] | [Pa] | ||
| 190 | 2.50295 | 2.99 x 10-4 | -3.52 | 0.66 | 4.6 |
| 2.44412 | 2.92 x 10-4 | -3.53 | 0.65 | 4.4 | |
| 200 | 4.30171 | 5.13 x 10-4 | -3.29 | 0.92 | 8.4 |
| 4.45309 | 5.32 x 10-4 | -3.27 | 0.94 | 8.7 | |
| 210 | 7.3096 | 8.73 x 10-4 | -3.06 | 1.18 | 15 |
| 8.48945 | 1.01´10-3 | -2.99 | 1.26 | 15 |
Vapour Pressure of the Test Item
| Temperature | log PT | PT | PT |
| [°C] | [Pa] | [mm Hg] | |
| 20 | -7.27 | 5.4 x 10-8 | 4.1 x 10-10 |
| 25 | -6.9 | 1.2 x 10-7 | 9.3 x 10-10 |
Description of key information
Study conducted to recognised testing guidelines with GLP certification.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 20 °C
Additional information
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