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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 202-327-6 | CAS number: 94-36-0
Endpoint summary
Administrative data
Description of key information
Additional information
Based on the available data on its physical and chemical properties, dibenzoyl peroxide is a white granular powder (crystals) with a faint and benzaldehyde-like odor at ambient temperature and pressure (diameter of wet powder particles around 135 µm). Its melting point is between 103 and 108°C at normal pressure and its relative density is 1.33 at 25°C. No boiling point is available because the peroxide decomposes before boiling (its Self Accelerating Decomposition Temperature (SADT) is around 65°C). The vapour pressure seems very low (it is estimated by calculation at 9.07 10-5hPa at 25°C).
It is considered as slightly soluble in water based on the water solubility of 0.35 mg/L at 20°C, and to be not potentially bioaccumulable based on the measured logKow value of 3.2.
Besides, dibenzoyl peroxide is well known to be explosive. The oxidising properties has not been evaluated (the substance is an organic peroxide).
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.
