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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The72h-EC50 for the toxicity of the substance to algae is 3.88 mg/L based on growth rate.

Key value for chemical safety assessment

EC50 for freshwater algae:
3.88 mg/L
EC10 or NOEC for freshwater algae:
0.177 mg/L

Additional information

The determination of the growth inhibition of the freshwater algae Pseudokirchneriella subcapitata exposed to the test item for 72 hours was assessed according to the OECD 201 guideline. The toxic effect measured during the assay was the inhibition of cellular multiplication over a time period of 72 hours.The concentrations of test item causing a 50% reduction in growth rate and in biomass were estimated. It was possible to determine No Observable Effect Concentrations (NOEC). The results were as follows:

Growth rate – Cell multiplication: 72h-EC50 = 3.88 mg/L (95%);

Cell growth – Biomass: 72h-EC50 = 1.11 mg/L (95% CI);

NOEC = 0.177 mg/L;