Registration Dossier

Diss Factsheets

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

The test substance Dicyandiamide is not toxic to aquatic organisms, with fish and daphnia acute toxicity (L/EC50) > 100 mg/L, fish long term toxicity (14-day prolonged toxicity NOEC) > 100 mg/L, daphnia long term toxicity (reproduction NOEC) of 25.0 mg/L, and a 4-day algal toxicity (growth NOEC) of 560 mg/L. Dicyandiamide is not toxic to ammonium-oxidizing bacteria: nitrification was completely inhibited, but numbers of ammonium-oxidizing bacteria were not significantly affected by a 48-h treatment with dicyandiamide applied at the rate of 100 mg inhibitor/L culture medium. The EC10(18h) for acute cell multiplication inhibition to Pseudomonas putida is > 100 mg/l.

Additional information

Categories Display