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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 632-556-0 | CAS number: 304859-44-7
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 November 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- 2009
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 2006
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: isothermal thermogravimetry
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.037 Pa
- Conclusions:
- Under the conditions of the study the vapour pressure of the test material was 0.0368 Pa at 20°C.
- Executive summary:
The vapour pressure of the test material was assessed in accordance with the standardised guidelines OECD 104 and EU Method A.4 under GLP conditions using the isothermal thermogravimetric effusion method.
Due to the test material properties no representative suspension could be prepared; the test material was added directly to the glass plate and was fixed with the spatula. The plate with the test material was placed in the TGA instrument. The weight loss of the test material was measured continuously as a function of time at different temperatures at constant nitrogen flow. Three replicates were conducted with the independent samples. All observations and the measurements obtained were documented in the raw data for each experiment.
The evaluation of the vapour pressure was done with the reproducible weight loss values above > 1 μg/min in the temperature range between 120°C to 150°C.
Under the conditions of the study the vapour pressure of the test material was 0.0368 Pa at 20°C.
Reference
The evaluation of the vapour pressure was done with the reproducible weight loss values above > 1 μg/min in the temperature range between 120°C to 150°C.
The plot of log VT of the test material as function of the reciprocal temperatures was determined. The coefficient of correlation (R²) was 0.9979.
The regression line of log PT as a function of log VT used for calibration was determined. The coefficient of correlation (R²) was 0.9825. The resulting equation was:
log PT = 4.3781 + 1.0022 ∙ log VT
Inserting the equation for log VT above, the following equation for the temperature dependence of the vapour pressure of the test material is obtained:
log PT = C + D ∙ (a · (1 000 / T) + b) = C + (D ∙ b) + (D ∙ a ∙1 000 ) / T
Where:
a = -2.7351;
b = 3.5353;
C = 4.3781; and
D = 1.0022
With this equation, a following vapour pressure results were obtained: 3.68 x 10^-2 Pa at 20 °C.
Description of key information
Under the conditions of the study the vapour pressure of the test material was 0.0368 Pa at 20°C.
Key value for chemical safety assessment
- Vapour pressure:
- 0.037 Pa
- at the temperature of:
- 20 °C
Additional information
The vapour pressure of the test material was assessed in accordance with the standardised guidelines OECD 104 and EU Method A.4 under GLP conditions using the isothermal thermogravimetric effusion method. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).
Due to the test material properties no representative suspension could be prepared; the test material was added directly to the glass plate and was fixed with the spatula.The plate with the test material was placed in the TGA instrument. The weight loss of the test material was measured continuously as a function of time at different temperatures at constant nitrogen flow. Three replicates were conducted with the independent samples. All observations and the measurements obtained were documented in the raw data for each experiment.
The evaluation of the vapour pressure was done with the reproducible weight loss values above > 1 μg/min in the temperature range between 120°C to 150°C.
Under the conditions of the study the vapour pressure of the test material was 0.0368 Pa at 20°C.
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.
