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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

Acutely toxic to algae

Key value for chemical safety assessment

EC50 for freshwater algae:
6.104 mg/L
EC10 or NOEC for freshwater algae:
0.26 mg/L

Additional information

In a non-GLP, 72-hour static test with the green alga Scenedesmus subspicatus (new name: Desmodesmus subspicatus) according to German Industrial Standard DIN 38412 part 9, the algae toxicity of 4,4´-methylendi-o-toluidine (original test name: o-Toluidinbase) was investigated. Statistical evaluation of the endpoint growth rate revealed an EC50 (72h) of 6.104 mg/L, the EC10 was estimated to be 0.26 mg/L, both related to the nominal concentration (BASF 1988, recalculation 2012)