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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 201-861-7 | CAS number: 88-85-7
Phototransformation in water
Administrative data
Link to relevant study record(s)
Description of key information
Two studies were provided for this endpoint:
In the Saxena, 1987 study, Dinoseb at a concentration of 28 mg/L was photodegraded in the buffer solution pH 7 for 17 days at 25 ºC.
Half-life (DT50):
t1/2: 33.3 d (Continuous light (24 hours sunlight/day))
t1/2: 66.6 d (Natural light (12 hours sunlight/day))
Transformation products: yes, at least two photoproducts were detected
In the Blair, 1986 study, Dinoseb at concentrations of 5 and 10 mg/L was irradiated in the buffer solution (pH 7) using artificial as well as natural sunlight. Dinoseb was photodegraded rapidly under natural sunlight conditions when compared with the artificial sunlight.
Half-life (DT50):
t1/2: 12 to 18 days (Natural sunlight (12 hours light/day))
t1/2: 102 d (Artificial sunlight results extrapolated to natural conditions)
Transformation products: At least 8 photodegradation products were detected
Key value for chemical safety assessment
Additional information
These studies were entered for assessment purposes only and are not considered necessary for REACH purposes.
Both supporting studies were assigned a reliability rating of 1, according to the criteria of Klimisch, 1997 as the studies were conducted according to standard methodology with analytical verification of test concentrations and GLP.
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.
