Registration Dossier
Registration Dossier
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EC number: 275-031-8 | CAS number: 70942-01-7
Biodegradation in water and sediment: simulation tests
Administrative data
Link to relevant study record(s)
Description of key information
No biodegradation is expected in water and sediment simulation testing
Key value for chemical safety assessment
Additional information
A field study at a full-scale STP on a similar substance in the category (CAS 16090-02-1) 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 test substances belonging to 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 for textile application and used in plants with an internal Sewage Treatment Plant, where the sludge is sent to incineration. No dispersive use is reported. No further tests on biodegradation on water and sediments are proposed.
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