Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Under test conditions, no biodegradation was observed.

Additional information

Several studies on the biodegradability in water are available on the category of Stilbene Fluorescent Whitening Agents and none of the substances is neither readily nor inherently biodegradable in the available studies. The complete overview of the category is reported in the Category Justification Report attached to the point 13 of this dossier. An inherently biodegradation test according to Zahn Wellens method was performed on the substance under registration (CAS 28950-61-0) and indicates that the test substance was presumably not biodegraded (DOC removal, mean values in the range from -1 to 4 %) (Seyfried B., 2008). The result is in agreement with the estimation made using BIOWIN 4.10 on the substance in itself. The most representative studies on ready and inherently biodegradation on analogous substances are also reported in a weight of evidence approach.