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EC number: 206-460-0 | CAS number: 345-35-7
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- February 26, 2020
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 020
- Report date:
- 2020
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- dynamic method
Test material
- Reference substance name:
- Reference substance 001
- Cas Number:
- 345-35-7
- Test material form:
- liquid
Constituent 1
- Specific details on test material used for the study:
- none
Results and discussion
Vapour pressureopen allclose all
- Key result
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 2.6 hPa
- Key result
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 1.9 hPa
Any other information on results incl. tables
The vapour pressure was measured with the dynamic method in the temperature range of 65 °C to 165 °C. The measured vapour pressures at the corresponding temperatures are listed in Table 1.
Table 1: Measured vapour pressures and corresponding temperatures
Temperature / °C | Vapour pressure / hPa |
65.0 | 20.0 |
83.3 | 50.0 |
99.8 | 100.0 |
111.6 | 150.0 |
120.2 | 200.0 |
132.3 | 300.0 |
148.8 | 500.0 |
166.0 | 800.0 |
92.3 | 75.0 |
75.6 | 35.0 |
Figure 1 on page 8 gives the vapour pressure (logarithmic scale) as a function of the inverse temperature (1/T, T in Kelvin). Only for better readability the temperature is reported in a centigrade scale.
From the measured data the parameters A, B and C of the Antoine equation can be derived by regression.
The evaluated Antoine parameters are listed Table 2.
Table 2: Antoine parameters
A | 8.21896 |
B | -2327.28 |
C | 273.15 |
The vapour pressure values for 20, 25 and 50 °C (see Table 2) were extrapolated, using these Antoine constants A, B and C.
Table 3: Vapour pressures
T / °C | p / hPa | p / Pa |
20 | 1.9 | 1.9 × 102 |
25 | 2.6 | 2.6 × 102 |
50 | 1.0 × 101 | 1.0 × 103 |
Applicant's summary and conclusion
- Executive summary:
The following vapour pressure values for the test item were extrapolated from the experimental data (vapour pressure: dynamic method):
T / °C
p / hPa
p / Pa
20
1.9
1.9 × 102
25
2.6
2.6 × 102
50
1.0 × 101
1.0 × 103
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