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EC number: 433-100-1 | CAS number: -
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- calculation (if not (Q)SAR)
- Adequacy of study:
- key study
- Study period:
- 1999-04-30 to 1999-08-12
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- accepted calculation method
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- adopted July 27, 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- December 1992
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- other: Calculation using the Modified Watson Correlation
- Key result
- Test no.:
- #1
- Temp.:
- 25 °C
- Vapour pressure:
- > 0 Pa
- Conclusions:
- In conclusion, the vapour pressure of the test substance (EC: 433-100-1) was estimated to be < 8 E-08 Pa at 25 °C based on the boiling point calculated and using the Modified Watson Correlation. From this result, it can be concluded that the vapour pressure of the test substance (EC: 433-100-1) is too low to have any relevant effect on the environment.
- Executive summary:
The estimation of the vapour pressure of the test substance (EC: 433-100-1) was based on OECD guideline No. 104 and EU method A.4. The boiling point of the test item is necessary for the calculation of the vapour pressure and was calculated using the Meissners method (Lyman et al., 1990). The test substance (EC: 433-100-1) is a mixture of 3 components. The components were obtained by the reaction of sebacic acid with sterylamine and neutralisation with LiOH. Therefore 3 skeletons were found. The lowest boiling point of the main components of the test substance (EC: 433-100-1) was calculated to be about 331 °C for the free acid of the component with the skeleton of sebacic acid using Meissner's method. The vapour pressure of this component was calculated to be 1 E-04 Pa. However, the lithium salt structure of this skeleton shows a lower vapour pressure than the free acid. The vapour pressure of dicalciumsebacate was estimated to be lower than 8 E-08 Pa. During the determination of the melting / melting range of the test item (see IUCLID section 4.2), a decomposition or reaction was observed starting at about 240 °C. This experimental result confirmed, that the boiling point of the test substance (EC: 433-100-1) is greater than 240 °C. In conclusion, the vapour pressure of the test item was estimated to be < 8 E-08 Pa based on the boiling point calculated and using the Modified Watson Correlation. From this result, it can be concluded that the vapour pressure of the test substance (EC: 433-100-1) is too low to have any relevant effect on the environment.
Reference
Description of key information
In conclusion, the vapour pressure of the test substance (EC: 433-100-1) was estimated to be < 8 E-08 Pa at 25 °C based on the boiling point calculated and using the Modified Watson Correlation. From this result, it can be concluded that the vapour pressure of the test substance is too low to have any relevant effect on the environment.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
The estimation of the vapour pressure of the test substance (EC: 433-100-1) was based on OECD guideline No. 104 and EU method A.4. The boiling point of the test item is necessary for the calculation of the vapour pressure and was calculated using the Meissners method (Lyman et al., 1990). The test substance (EC: 433-100-1) is a mixture of 3 components. The components were obtained by the reaction of sebacic acid with sterylamine and neutralisation with LiOH. Therefore 3 skeletons were found. The lowest boiling point of the main components of the test substance (EC: 433-100-1) was calculated to be about 331 °C for the free acid of the component with the skeleton of sebacic acid using Meissner's method. The vapour pressure of this component was calculated to be 1 E-04 Pa. However, the lithium salt structure of this skeleton shows a lower vapour pressure than the free acid. The vapour pressure of dicalciumsebacate was estimated to be lower than 8 E-08 Pa. During the determination of the melting / melting range of the test item (see IUCLID section 4.2), a decomposition or reaction was observed starting at about 240 °C. This experimental result confirmed, that the boiling point of the test substance (EC: 433-100-1) is greater than 240 °C. In conclusion, the vapour pressure of the test item was estimated to be < 8 E-08 Pa based on the boiling point calculated and using the Modified Watson Correlation. From this result, it can be concluded that the vapour pressure of the test substance (EC: 433-100-1) is too low to have any relevant effect on the environment.
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