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EC number: 224-073-5 | CAS number: 4193-55-9
No biodegradation is expected in soil.
A field study at a full-scale STP on a similar substance in the category (OB 2-A) gave no evidence of biodegradation when the mass flow of one of the substances of the category was monitored (Poiger, 1994. IUCLID section 5.5.2).
It is assumed that the substances in the Stilbene Fluorescent Whitening Agents category are not biodegradable in simulation tests either.
However, 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 at a very high extent the amount of the substance available in the environment.
No further tests on biodegradation on soil are proposed.
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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