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EC number: 222-824-1 | CAS number: 3623-51-6
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:
- 02-Oct-2014 to 22-Jul-2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Qualifier:
- according to guideline
- Guideline:
- other: OECD Test Guideline 113 (1981) Thermal Stability
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- GLP compliance:
- no
- Type of method:
- effusion method: Knudsen cell
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 2.4 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- 3.6 Pa
- Temp.:
- 50 °C
- Vapour pressure:
- 20.8 Pa
- Conclusions:
- Vapour pressure values of 2.4 Pa (at 20 °C), 3.6 Pa (at 25 °C) and 20.8 Pa (at 50 °C) were determined for the test substance according to EU Method A.4.
Reference
Results
The measured vapour pressure values together with the measured temperatures are listed in Table 1.
Table 1: Results of the Effusion method
No. |
Temperature / °C |
Vapour pressure / Pa |
1 |
10 |
1.04 |
2 |
15 |
1.66 |
3 |
20 |
2.38 |
4 |
25 |
4.20 |
5 |
30 |
4.83 |
The measured vapour pressure is slightly outside the measuring range (10-3 to 1 Pa) of the Knudsen cell. Nevertheless, as the vapour pressure value above 1 Pa could be detected properly by the Knudsen cell, this value can be used for the evaluation.
Final Results
The vapour pressure of the test item calculated by interpolation and extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C, according to Regulation EC No. 440/2008 Method A.4. Vapour Pressure and OECD Test Guideline 104 (2006) is shown in Table 2.
Table 2: Calculated vapour pressure values for 20, 25 and 50 °C
Temperature / °C |
Vapour pressure / Pa |
20 |
2.4 |
25 |
3.6 |
50 |
20.8 |
Description of key information
Vapour pressure: 2.4 Pa at 20 °C (EU Method A.4, vapour pressure curve).
Key value for chemical safety assessment
- Vapour pressure:
- 3.6 Pa
- at the temperature of:
- 25 °C
Additional information
Vapour pressure values of 2.4 Pa (at 20 °C), 3.6 Pa (at 25 °C) and 20.8 Pa (at 50 °C) were determined for the test substance according to EU Method A.4.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
