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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Administrative data

Link to relevant study record(s)

Description of key information

Direct Blue 273 is a dye and this may impact the experiments conducted on algae. For this reason, it has been judged as more appropriate in the assessment to use a study on Lemna aquatic plant.

Key value for chemical safety assessment

Additional information

No data on Direct Blue 273 was available, thus the assessment was based on a read across approach, using Similar Substance 01, i.e. an isomer of Direct Blue 273 differing only for the position of a functional group on an aromatic ring.

In the available study on algae based on EU method C.3, effects of direct and indirect exposure to Similar Substance 01 were within 10 % at all concentrations, thus demonstrating that the colour of test solution may contribute to the final outcome. Consequently, this result was not used in the assessment.