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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 204-635-6 | CAS number: 123-56-8
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- other: Handbook data
- Adequacy of study:
- key study
- Study period:
- unkown
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Principles of method if other than guideline:
- Method not reported. Handbook data.
- GLP compliance:
- not specified
- Type of method:
- other: Handbook data only. No guideline or method is indicated.
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Remarks on result:
- other: result extrapolated from series of measurements at higher temperatures
- Conclusions:
- The extrapolated vapour pressure of the test item is 2.680E-08 mmHg (=3.57E-06 Pa) at 25 °C.
- Executive summary:
The extrapolated vapour pressure of the test item is 2.680E-08 mmHg (=3.57E-06 Pa) at 25 °C.
T [°C] VP [mm Hg] 115 1 143.2 5 157 10 174 20 192 40 203 60 217.4 100 240 200 263 400 287.5 760 The Handbook reports 10 different vapour pressures for different temperatures. Based on this temperatures a vapour pressure for 25 °C can be extrpolated:
1 / T [°C]
Log VP
0.00869565
0.00
0.00698324
0.70
0.00636943
1.00
0.00574713
1.30
0.00520833
1.60
0.00492611
1.78
0.00459982
2.00
0.00416667
2.30
0.00380228
2.60
0.00347826
2.88
Based on these values the equation y = -550.58x + 4.5883 can be set (R² =0.9797) and the vapour pressure at 25 °C can be caluclated:
T [°C]
1 / T [°C]
Log VP (extrapolated)
VP (extrapolated) [mm Hg]
20
0.05
-22.9407
1.089E-10
25
0.04
-17.4349
2.680E-08
50
0.02
-6.4233
1.623E-03
Reference
The value is extrapolated from 10 vapour pressure values covering temperatures from 115 to 287.5 °C:
| T [°C] | VP [mm Hg] |
| 115 | 1 |
| 143.2 | 5 |
| 157 | 10 |
| 174 | 20 |
| 192 | 40 |
| 203 | 60 |
| 217.4 | 100 |
| 240 | 200 |
| 263 | 400 |
| 287.5 | 760 |
The Handbook reports 10 different vapour pressures for different temperatures. Based on this temperatures a vapour pressure for 25 °C can be extrpolated:
1 / T [°C] |
Log VP |
0.00869565 |
0.00 |
0.00698324 |
0.70 |
0.00636943 |
1.00 |
0.00574713 |
1.30 |
0.00520833 |
1.60 |
0.00492611 |
1.78 |
0.00459982 |
2.00 |
0.00416667 |
2.30 |
0.00380228 |
2.60 |
0.00347826 |
2.88 |
Based on these values the equation y = -550.58x + 4.5883 can be set (R² =0.9797) and the vapour pressure at 25 °C can be caluclated:
T [°C] |
1 / T [°C] |
Log VP (extrapolated) |
VP (extrapolated) [mm Hg] |
20 |
0.05 |
-22.9407 |
1.089E-10 |
25 |
0.04 |
-17.4349 |
2.680E-08 |
50 |
0.02 |
-6.4233 |
1.623E-03 |
The extrapolated vapour pressure of the test item is 2.680E-08 mmHg (=3.57E-06 Pa) at 25 °C.
Description of key information
The vapour pressure of the test item is 2.680E-08 mmHg (=3.57E-06 Pa) at 25 °C.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
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.
