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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

In this study, Basic Blue 99 was found to inhibit the growth of the freshwater green alga Pseudokirchneriella subcapitata after 72 hours with the following effect values (based on calculated test item concentrations): The EC50-values with 95% confidence intervals for inhibition of growth rate (ErC50) and yield (EyC50) after 72 hours were 0.253 (0.211 – 0.304) mg/L and 0.0552 (0.0439 – 0.0673) mg/L, respectively. The NOEC-values for both inhibition of growth rate and yield after 72 hours were 0.0258 mg/L. All effect level are based on the calculated test item concentrations.

Key value for chemical safety assessment

EC50 for freshwater algae:
0.06 mg/L

Additional information