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Environmental fate & pathways

Endpoint summary

Administrative data

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Additional information

Several studies on the biodegradability in water are available on the substance and his analogues within the Stilbene Fluorescent Whitening Agent category (See Justification Category Report in section 13). For all members of the category no biodegradation has been observed, neither readily, neither inherently, while adsorption happens from medium to high extent, usually immediately, for CAS 68971-49-3 in a few days.

A field study at a full-scale STP on the analogous substance CAS 16470-24-9 (Poiger 1994) gave no evidence of biodegradation when the mass flow was monitored. A simulation study according to OECD 303A has been performed for which a summary is available, indicating a %TOC of 4%.

It can be assumed that the test substance would be non biodegradable in soil and sediment either.