ISO 6341.2012 specifies a method for the determination of the acute toxicity to Daphnia magna Straus (Cladocera, Crustacea). This method is applicable to: chemical substances which are soluble under the conditions of the test, or can be maintained as a stable suspension or dispersion under the conditions of the test; industrial or sewage effluents; treated or untreated waste water; aqueous extracts and leachates; fresh water (surface and ground water); eluates of fresh water sediment; pore water of fresh water sediment.