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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 204-337-6 | CAS number: 119-61-9
Endpoint summary
Administrative data
Description of key information
Additional information
The photodegradation of benzophenone in air was calculated using the generally accepted calculation model EPI Suite v.4.0, AOPWIN v1.92. Based on a reaction rate constant k(OH)=3.5549 x 10E-12 cm³/molecule x s and taking into account the OH radical concentration of 5 x 10E5 radicals/cm³, a half-life t1/2=4.5 days was calculated. Benzophenone is not expected to undergo hydrolysis in the environment due to the lack of functional groups that hydrolyze under environmental conditions. After irradiation of aqueous solutions of benzophenone with artificial UV or sunlight 4 -hydroxy and 3 -hydroxybenzophenone were identified as photoproducts.
Benzophenone was shown to be photodegraded at low concentrations in pure water as well as in non-polluted surface water from East Lake and Changjiang River (Wuhan, China). The wavelength-averaged (250 -350 nm) quantum yields of benzophenone were determined to be 0.0013 +/- 0.001. Half-life times (1/2) of 16.23, 10.62, and 8.672 h were determined for the photlytic degradation of benzophenone in pure water, East Lake water, and Changjiang water. It could be shown that the presence of Cl(-), Fe(3 +), and humic acids, the initial benzophenone concentration, a continuous benzophenone input, the presence of benzophenone analogues influenced the degradation rate.
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.
