Registration Dossier
Registration Dossier
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EC number: 251-410-3 | CAS number: 33229-34-4
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
The vapour pressure is predicted by MPBPWIN as 2.92E-009 Pa at 25 deg C using an experimental melting point of 103 deg C. The mechanism simply relates descriptors to a predicted value using a mathematical physchem expression. The descriptors fall within the data set used to validate the model. The use of a melting point to predict the vapour pressure, which is expected to achieve better results than relying on an estimated melting point as an input. Based on the results of a validation exercise during MPBPWIN development, there is increasing uncertainty in predictions for substances with very low vapour pressure. As uncertainties in the predicted value of the vapour pressure are not expected to significantly affect the safety assessment or safe handling of the substance based on the intended use under the EU REACH Regulation, the predicted value is considered adequate for the purpose of a registration under REACH.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
The vapour pressure is predicted by MPBPWIN as 2.92E-009 Pa at 25 deg C using an experimental melting point of 103 deg C. The mechanism simply relates descriptors to a predicted value using a mathematical physchem expression. The descriptors fall within the data set used to validate the model. The use of a melting point to predict the vapour pressure, which is expected to achieve better results than relying on an estimated melting point as an input. Based on the results of a validation exercise during MPBPWIN development, there is increasing uncertainty in predictions for substances with very low vapour pressure. As uncertainties in the predicted value of the vapour pressure are not expected to significantly affect the safety assessment or safe handling of the substance based on the intended use under the EU REACH Regulation, the predicted value is considered adequate for the purpose of a registration under REACH.
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.
