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Toxicity to aquatic algae and cyanobacteria

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For 3,4-dichlorophenyl isocyanate no short-term tests on toxicity to aquatic plants are available. Therefore, the short-term toxicity test of the main hydrolysis product 3,4-dichloroaniline with the lowest value is used to draw a conclusion on toxicity to aquatic plants for the parent compound.
Concerning the acute toxicity of 3,4-dichloroaniline to aquatic plants (Scenedesmus pannonicus), a study was performed according to a national standard method: determination of the toxic effect on the growth of algae. After 96 h exposure, a EC50 of 4.8 mg/l and a NOEC of 1.0 mg/l was obtained (Adema 1982).

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