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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

In good an quality OECD guideline study the acute toxicity of C12-C18 TMAC (active ingredient 33%) to Daphnia magna under static conditions was evaluatedDaphnia magna(10 per dose) were exposed to the test substance at nominal concentrations of 236, 394, 667, 1,091, 1,818 and 3,030 µg/L for 48 hours and mortalities were determined. The 48 hour EC50and 95% confidence interval were calculated by probit analysis as 280 (250 - 300) µg/L. No analytical determination was performed for the test substance. The NOEC was < 236 µg/L, the lowest tested concentration. Based on the results, the 48 hour EC50 and NOEC were 280 and <236 µg/L, (i.e., equivalent to 0.09 and <0.08 mg a.i./L) , respectively (Surprenant DC, 1988).

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
0.09 mg/L

Additional information

An OECD 202 study was conducted to evaluate the acute toxicity of C12-C18 TMAC (active ingredient is 33%) toDaphnia magnaunder static conditions.Daphnia magna(10 per dose) were exposed to the test substance at nominal concentrations of 236, 394, 667, 1,091, 1,818 and 3,030 µg/L for 48 hours and mortalities were determined. The 48 hour EC50and 95% confidence interval were calculated by probit analysis as 280 (250 - 300) µg/L. No analytical determination was performed for the test substance. The NOEC was < 236 µg/L, the lowest tested concentration. Based on the results, the 48 hour EC50and NOEC were 280 and <236 µg/L, (i.e., equivalent to 0.09 and <0.08 mg a.i./L) , respectively (Surprenant DC, 1988).