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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

In a guideline study the EC10 value of the read-across substance C16 TMAC in P. putida was 1.6 mg/L, the EC50  3.2 was mg/L and the EC100 was 7.7 mg/L (nominal). This is equivalent to 0.40, 0.96 and 2.31 mg/L, respectively, based on active ingredient.

Key value for chemical safety assessment

EC50 or LC50 for microorganisms:
0.96 mg/L
EC10, LC10 or NOEC for microorganisms:
0.4 mg/L

Additional information

A study was conducted to determine the toxicity of C16 TMAC to the microorganismPseudomonas putida according to guidelines.P. putida was exposed to the test substance at nominal concentrations of 0.24 - 31.3 mg/L (i.e. 0.07 - 9.14 mg a.i./L ) for 16 hours. A positive control, 2,4 dichlorophenol, was also included in the study.No analytical determination was performed for the test substance.Under the test conditions, the EC10 , EC50 and EC100 for P. putida were1.6 mg/L, 3.2 mg/L and 7.7 mg/L (nominal). This is equivalent to 0.40, 0.96 and 2.31 mg a.i./L, respectively (Stuhlfauth T, 1993).