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EC number: 218-964-8 | CAS number: 2304-30-5
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:
- 2014
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: In accordance with test guidelines EC A.4 and OECD 104 but with a deviation.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- (2006)
- Deviations:
- yes
- Remarks:
- An Aluminium pan has been used instead of a roughened glassplate.
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- yes
- Remarks:
- see above
- GLP compliance:
- no
- Type of method:
- other: Effusion method: isothermal thermogravimetry
- Temp.:
- 25 °C
- Vapour pressure:
- 0.018 Pa
- Conclusions:
- Using the isothermal thermogravimetric effusion method, the vapour pressure of the substance at 25°C has been determined as 0.018 Pa.
Reference
Table: Experimental evaporation rates of test substance with calculated vapour pressure.
Temp. (°C) |
Evaporation Rate (µg/min) |
log Evaporation Rate (µg/min) |
Temp. (1/K) |
Log Vapour Pressure (mmHg) |
Calculated Vapour Pressure (mm Hg) |
Calculated Vapour Pressure (Pascal) |
50 |
0.02374 |
-1.6245 |
0.00309 |
-3.3295 |
0.00046826 |
0.062429 |
60 |
0.03488 |
-1.4574 |
0.00300 |
-3.1573 |
0.00069621 |
0.092821 |
65 |
0.04315 |
-1.3650 |
0.00296 |
-3.0620 |
0.00086697 |
0.11559 |
70 |
0.05094 |
-1.2929 |
0.00291 |
-2.9877 |
0.0010287 |
0.13715 |
80 |
0.08012 |
-1.0963 |
0.00283 |
-2.7849 |
0.0016408 |
0.21876 |
The isotherms at 65°C is shown in the picture below along with the heat profile and slope at constant rate of weight loss (over 300 minutes).
Description of key information
Vapour pressure at 25°C: 0.018 Pa (EC A.4 and OECD 104: isothermal thermogravimetric effusion method)
Key value for chemical safety assessment
- Vapour pressure:
- 0.018 Pa
- at the temperature of:
- 25 °C
Additional information
Deviation from the test guidelines: an Aluminium pan has been used instead of a roughened glassplate.
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.
