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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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


Key value for chemical safety assessment

Additional information

The algae are usually preferred as reference aquatic plants in a study of growth inhibition. However, coloured substances cause problems in interpreting test algae, because the effects of the absorption of light can interact with potential toxicity; therefore, the inhibition of the growth of algae would no longer be only the result of a toxic action, but also the result of physical phenomena [shading effect] (OECD guideline 221 according to the Guidance on Information Requirements and Chemical Safety Assessment Chapter R.7b: Endpoint specific guidance (Version 2.0 November 2014), published by the European Chemical Agency)