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Short-term toxicity to aquatic invertebrates

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Description of key information

EC50 (48 h): 10.448 mg/L (OECD 202)

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
10.448 mg/L

Additional information

One study is available investigating the short-term toxicity of 4,4',4''-methylidynetrianiline (EC No. 208-952-0) to aquatic invertebrates (Spoo-Klöppel, 2015). Daphnia magna was exposed to nominal concentrations of 1.9, 4.3, 9.4, 20.7, 45.5, 100 mg/L. The actual test substance concentrations in the test medium were verified by HPLC/UV-VIS analysis at 0 and 48 h. It was shown that the initially measured concentrations were lower compared to the nominal concentrations. However, the initial measured concentrations did not differ > 20 % from the measured concentrations after 48 h. Thus, the effect concentrations were based on the initially measured concentrations.
After 24 h of exposure no immobilization was recorded, whereas 50 % immobilization was observed after 48 h at the highest concentration tested. An EC50 (48 h) of 10.448 mg/L was calculated by probit analysis.