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EC number: 237-600-9
CAS number: 13863-31-5
test substance is a solid with very low vapour pressure, very high
solubility and low Kow. It has been estimated as hydrolytically stable
at pH 4, 7 and 9 at 50 °C and it has an estimated half-life period
longer than one year at 25 °C at pH 4, 7 and 9. The substance has not
hydrolysable chemical groups in the chemical structure.
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 26 minutes taking into account a 12-h day and a mean
OH radical concentration of 286.09 E-12 cm3/molecule-sec.
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 water,
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
Adsorption will partially bring the
substance onto the surface of suspended particles and will also
contribute to the adsorption of the substance into sediments, where an
anaerobic degradation process can be effective. Nevertheless this is
unlikely to occur in the usual conditions of use, where the substance is
adsorbed to the sludge in the STP, therefore significant release into
surface waters is not expected and exposure of sediment is thereby
substance has been estimated as not bioaccumulable based on the log Kow
and the testing results on similar substances in the category.
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.
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