Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 921-136-5 | CAS number: -
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:
- 31.03.-04.04.2014
- 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:
- no
- Type of method:
- effusion method: vapour pressure balance
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Temp.:
- 50 °C
- Vapour pressure:
- 0 Pa
- Conclusions:
- Vapour pressures of 3.1*10^-8 hPa at 20 °C, 6.8*10^-8 hPa at 25 °C and 2.6*10^-6 hPa at 50 °C were determined for the test item.
- Executive summary:
A study was performed according to OECD 104 and Commission Regulation (EC) No. 440/2008, method A.4 in order to determine the vapour pressure of the test item by using the effusion method (vapour pressure balance). The vapour pressure was measured at various temperatures between 50 and 110 °C. The vapour pressures of the test item at 20, 25 and 50 °C were extrapolated by using the Antoine constants. Vapour pressures of 3.1*10^-8 hPa at 20 °C, 6.8*10^-8 hPa at 25 °C and 2.6*10^-6 hPa at 50 °C were determined for the test item.
Reference
Thermal stability
The DSC-measurement in a closed glass crucible showed a significant endothermic effect in the temperature range of 70-90 °C. In the temperature ranges of 165-180 °C and 480-495 °C two smaller endothermic effects were observed. No further endo- or exothermic effects were observed up to the final temperature of 500 °C.
Vapour pressure balance (effusion method)
The vapour pressure was measured in the temperature range of 50 °C to 110 °C. The measured vapour pressures at the corresponding temperatures are listed in the following table:
Temperature / °C | Vapour pressure / hPa |
50 | 4.3*10^-6 |
60 | 4.9*10^-6 |
70 | 2.5*10^-6 |
80 | 1.6*10^-5 |
90 | 5.2*10^-5 |
100 | 1.5*10^-4 |
110 | 3.4*10^-4 |
The measured vapour pressure values at 50 and 60 °C were most likely caused by volatile impurities. At 70 °C the measured vapour pressure was below the lower detection limit of the vapour pressure balance. Therefore, the measured vapour pressure values from 50-70 °C were not taken into account for the evaluation of the vapour pressure.
The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C.
The following constants were determined: A=13.22941, B=-6081.36, C=273.15. Vapour pressures of 3.1*10^-8 hPa at 20 °C, 6.8*10^-8 hPa at 25 °C and 2.6*10^-6 hPa at 50 °C were determined.
Description of key information
Vapour pressures of 3.1*10^-8 hPa at 20 °C, 6.8*10^-8 hPa at 25 °C and 2.6*10^-6 hPa at 50 °C were determined for the test item.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 20 °C
Additional information
A study was performed according to OECD 104 and Commission Regulation (EC) No. 440/2008, method A.4 in order to determine the vapour pressure of the test item by using the effusion method (vapour pressure balance). The vapour pressure was measured at various temperatures between 50 and 110 °C. The vapour pressures of the test item at 20, 25 and 50 °C were extrapolated by using the Antoine constants. Vapour pressures of 3.1*10^-8 hPa at 20 °C, 6.8*10^-8 hPa at 25 °C and 2.6*10^-6 hPa at 50 °C were determined for the test item.
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.
