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EC number: - | CAS number: -
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 8 December 2008 - 23 January 2009
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Study conducted to GLP in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 009
- Report date:
- 2009
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- isoteniscope
Test material
- Test material form:
- other: liquid (not specified)
- Details on test material:
- Description: dark brown liquid
Storage conditions: room temperature, in the dark
Constituent 1
Results and discussion
Vapour pressure
- Temp.:
- 25 °C
- Vapour pressure:
- 4 900 Pa
Any other information on results incl. tables
Run 1
A plot of Log (vapour pressure (Pa)) versus reciprocal temperature (1 / T (K)) gives the following statistical data using an unweighted least squares treatment:
Slope: -1890.218
Standard deviation in slope: 16.170
Intercept: 10.014
Standard deviation in intercept: 0.048
The results indicate the following relationship: Log (Vp (Pa)) = -1890.218 / temp (K) + 10.014
This yields a vapour pressure (Pa) at 298.15 K with a common logarithm of 3.674.
Run 2
A plot of Log (vapour pressure (Pa)) versus reciprocal temperature (1 / T (K)) gives the following statistical data using an unweighted least squares treatment:
Slope: -1813.476
Standard deviation in slope: 8.828
Intercept: 9.806
Standard deviation in intercept: 0.026
The results indicate the following relationship: Log (Vp (Pa)) = -1813.476 / temp (K) + 9.806
This yields a vapour pressure (Pa) at 298.15 K with a common logarithm of 3.273.
Run 3
A plot of Log (vapour pressure (Pa)) versus reciprocal temperature (1 / T (K)) gives the following statistical data using an unweighted least squares treatment:
Slope: -2088.029
Standard deviation in slope: 15.617
Intercept: 10.554
Standard deviation in intercept: 0.046
The results indicate the following relationship: Log (Vp (Pa)) = -2088.029 / temp (K) + 10.554
This yields a vapour pressure (Pa) at 298.15 K with a common logarithm of 3.551.
Run 4
A plot of Log (vapour pressure (Pa)) versus reciprocal temperature (1 / T (K)) gives the following statistical data using an unweighted least squares treatment:
Slope: -1582.976
Standard deviation in slope: 8.271
Intercept: 9.170
Standard deviation in intercept: 0.024
The results indicate the following relationship: Log (Vp (Pa)) = -1582.976 / temp (K) + 9.170
This yields a vapour pressure (Pa) at 298.15 K with a common logarithm of 3.861.
Run 5
A plot of Log (vapour pressure (Pa)) versus reciprocal temperature (1 / T (K)) gives the following statistical data using an unweighted least squares treatment:
Slope: -1913.444
Standard deviation in slope: 7.477
Intercept: 10.059
Standard deviation in intercept: 0.022
The results indicate the following relationship: Log (Vp (Pa)) = -1913.444 / temp (K) + 10.059
This yields a vapour pressure (Pa) at 298.15 K with a common logarithm of 3.641.
Table 1 Summary of Results
Run |
Log [Vp (25 °C)] |
1 |
3.674 |
2 |
3.723 |
3 |
3.551 |
4 |
3.861 |
5 |
3.641 |
Mean = 3.690
Vapour Pressure = 4.9 x 10³ Pa
Applicant's summary and conclusion
- Conclusions:
- The vapour pressure of the test material has been determined to be 4.9 x 10³ Pa at 25 °C.
- Executive summary:
The vapour pressure of the test material was investigated in accordance with the standardised guideline EU Method A.4 using an isoteniscope system with measurements being made at several temperatures and linear regression analysis used to calculate the vapour pressure at 25 °C.
The vapour pressure of the test material has been determined to be 4.9 x 10³ Pa at 25 °C.
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