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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Description of key information

No data on the biodegradation in simulation tests are available for the members of the stilbene fluorescent whitening agents category.

Key value for chemical safety assessment

Additional information

No data on the biodegradation in sediments and surface water are available for the stilbene fluorescent whitening agents category. However, further biotic degradation testing shall be proposed if the chemical safety assessment according to Annex I indicates the need to investigate further degradation of the substance and its degradation products. The test substances in the stilbene fluorescent whitening agents category were found to be non-biodegradable in studies concerning ready and inherent biodegradability as well as BOD5. A field study at a full-scale STP gave no evidence of biodegradation when the mass flow of one of the substances of the category was monitored (CAS 16090 -02 -1). It is assumed that the test substances in the stilbene fluorescent whitening agents category are not biodegradable in simulation tests either. Therefore, simulation studies on surface water and sediments are not provided for the stilbene fluorescent whitening agents category.