Registration Dossier
Registration Dossier
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EC number: 249-323-0 | CAS number: 28950-61-0
Endpoint summary
Administrative data
Description of key information
The test substance was found to be not readily biodegradable but hydrolytically stable.
Additional information
The test substance is predicted to be hydrolytically stable since it has not hydrolysable chemical groups in the chemical structure. Based on calculations according to AOPWIN v1.92, the substance is indirectly photodegraded by reaction with hydroxyl radicals in the atmosphere with half-lives of about 23 minutes taking into account a 12-h day and a mean OH radical concentration of 1.5E06 radicals per cm³. The substance is a member of the Stilbene Fluorescent Whitening Agents category and based on the data on analogous substances in the category it is estimated to undergo direct photodegradation in surface waters, with half-lives ranging from about to 4 to 5 hours in the photic zone of lakes and rivers. Field measurements combined with mathematical modelling of sedimentation and photolysis show that direct photolysis is the only pathway of degradation and effective throughout the aquatic zone due to the dynamics of rivers and layers in lakes. There is no indication of biodegradability.
The substance has been predicted as not bioaccumulative.
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