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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

EC50 for freshwater algae:
2 mg/L

Additional information

Reliable short-term test results are available for ammonia sourced from the Environment Agency Proposed EQS for Water Framework Directive Annex VIII Substances: Ammonia (unionised) 2007. A five day EC50 of 2.0 mg NH3/l, and a 14 day LOEC of 3.0 mg NH3/l has been reported for toxicity of ammonia to algae.