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EC number: 240-521-2
CAS number: 16470-24-9
No biodegradation is expected in water and sediment simulation testing
The anaerobic degradation was evaluated
according to procedures outlined into the ECETOC Technical Report No.
28. The resulting degradation rates are different: the reason of this
difference is not evaluable.
A further field study at a full-scale STP
on a similar substance in the category of the Stilbene Fluorescent
Whitening Agents (CAS 16090-02-1) gave no evidence of biodegradation
when the mass flow was monitored (Poiger, 1994 – Section 5.5.2: Field
Considering all biotic degradation
available studies for the members of the category (see Category
Reporting Document to the section 13 of the dossier), structural
similarities, estimated and calculated data, metabolic previsions, it
can be assumed that all members have the same behaviour in the biotic
It is assumed that the test substances in
category are not biodegradable in simulation tests either.
Further biotic degradation testing shall
be proposed only if the Chemical Safety Assessment, according to Annex
I, indicates the need to investigate further degradation of the
substance and its degradation products. Based on the Chemical Safety
Assessment the exposure of sediment and soil will be negligible, since
the substance and its formulations are produced and used in plants with
internal Sewage Treatment Plant, where the sludge is sent to
incineration. The only potential dispersive use could be in the
detergency field, with public consumer use. In this case there is a
potential for exposure, but the quantities and secondary process of
photooxidation lower the amount of the substance available in the
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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