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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Classification & Labelling & PBT assessment

PBT assessment

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Administrative data

PBT assessment: overall result

SRE 658
Type of composition:
legal entity composition of the substance
State / form:
solid: bulk
Reference substance:
SRE 658
PBT status:
the substance is not PBT / vPvB

Persistence Assessment

The substance is neither readily nor inherently biodegradable in standard tests for biodegradability. However, the substance is subject to photolysis.


Bioaccumulation Assessment

Due to the very low log Kow of less than 0, the substances have no potential for bioaccumulation. The log Kow of the substance is very much lower than the threshold value of the screening criterion for B (log Kow >4.5). Furthermore, experimental tests on an analogous substance of the Stilbene Fluorescent Whitening Agents category on fish was performed and no evidence for bioaccumulation was indicated.

In all experiments only trace concentrations (less than 0.05 mg/kg) of the tested substance were present in the fish at exposure levels up to of 1 mg/l. In most instances, no detectable substance levels were found. Therefore B-criterion is not fulfilled.


Toxicity Assessment

The substance is non toxic to mammalian and aquatic organisms. The substance is classified neither for environmental toxicity nor as CMR or T, R 48 or Xn, R 48. It can be concluded that the substance has no toxic properties.