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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

Cetrimonium bromide is toxic to freshwater microalgae in the microgram/L range. Data provided from a OECD Guideline study shows EC50 of 4.11 microgram/L, and a NOEC of 1.1 microgram/L.

Key value for chemical safety assessment

EC50 for freshwater algae:
4.11 µg/L
EC10 or NOEC for freshwater algae:
1.1 µg/L

Additional information

Two dataset have been evaluated. One OECD Guideline study and a dataset from the Ministry of the Environment of Japan. Both sources show toxicity of cetrimonium bromide to freshwater microalgae in the microgram/L range. Data provided from the OECD Guideline study shows the highest toxicity with EC50 of 4.11 microgram/L, and a NOEC of 1.1 microgram/L.