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EC number: 619-228-2 | CAS number: 96556-05-7
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:
- 09 September 2014 to 11 September 2014
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 2006
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- 2008
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: vapour pressure balance
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 123 Pa
- Conclusions:
- Under the conditions of this study the vapour pressure of the test material has been determined to be 123 Pa at 25 °C.
- Executive summary:
The vapour pressure of the test material was investigated in accordance with the standardised guidelines OECD 104 and EU Method A.4, under GLP conditions using the vapour pressure balance method.
A total of six runs were completed for the main sequence. Equilibrium with regard to vapour pressure was assessed to have been reached over the final four runs. Thus the final four runs have been used to calculate the definitive vapour pressure value for the test material.
Under the conditions of this study the vapour pressure of the test material has been determined to be 123 Pa at 25 °C.
Reference
Run 3
A plot of Log10 (vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 3 gives the following statistical data using an unweighted least squares treatment:
Slope: -3.48 x10^3
Standard error in slope: 38.7
Intercept: 13.7
Standard error in intercept: 0.156
The results obtained indicate the following vapour pressure relationship:
Log10 (Vp (Pa)) = [-3.48 x 10^3/temp(K)] + 13.7
The above yields a vapour pressure (Pa) at 298.15 K with a common logarithm of 2.08.
Run 4
A plot of Log10 (vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 4 gives the following statistical data using an unweighted least squares treatment:
Slope: -3.55 x10^3
Standard error in slope: 56.8
Intercept: 14.0
Standard error in intercept: 0.229
The results obtained indicate the following vapour pressure relationship:
Log10 (Vp (Pa)) = [-3.55 x 103/temp(K)] + 14.0
The above yields a vapour pressure (Pa) at 298.15 K with a common logarithm of 2.11.
Run 5
A plot of Log10 (vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 5 gives the following statistical data using an unweighted least squares treatment:
Slope: -3.47 x10^3
Standard error in slope: 48.1
Intercept: 13.7
Standard error in intercept: 0.194
The results obtained indicate the following vapour pressure relationship:
Log10 (Vp (Pa))= [-3.47 x 10^3/temp(K)] + 13.7
The above yields a vapour pressure (Pa) at 298.15 K with a common logarithm of 2.08.
Run 6
A plot of Log10 (vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 6 gives the following statistical data using an unweighted least squares treatment:
Slope: -3.53 x10^3
Standard error in slope: 49.2
Intercept: 13.9
Standard error in intercept: 0.198
The results obtained indicate the following vapour pressure relationship:
Log10 (Vp (Pa))= [-3.53 x 103/temp(K)] + 13.9
The above yields a vapour pressure (Pa) at 298.15 K with a common logarithm of2.10.
Summary of Results
Log10[Vp(25 °C)]=
- Run 3: 2.08
- Run 4: 2.11
- Run 5: 2.08
- Run 6: 2.10
- Mean: 2.09
- Vapour pressure = 123 Pa
- The test material did not change in appearance under the conditions used in the determination.
Discussion
A total of six runs were completed for the main sequence. Equilibrium with regard to vapour pressure was assessed to have been reached over the final four runs. Thus the final four runs have been used to calculate the definitive vapour pressure value for the test material.
Description of key information
Under the conditions of this study the vapour pressure of the test material has been determined to be 123 Pa at 25 °C.
Key value for chemical safety assessment
- Vapour pressure:
- 123 Pa
- at the temperature of:
- 25 °C
Additional information
The vapour pressure of the test material was investigated in accordance with the standardised guidelines OECD 104 and EU Method A.4, under GLP conditions using the vapour pressure balance method. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).
A total of six runs were completed for the main sequence. Equilibrium with regard to vapour pressure was assessed to have been reached over the final four runs. Thus the final four runs have been used to calculate the definitive vapour pressure value for the test material.
Under the conditions of this study the vapour pressure of the test material has been determined to be 123 Pa at 25 °C.
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