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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

4-Hydroxy TEMPO was tested for toxicity to microorganisms in a 16 hour study on Pseudomonas putida test according to DIN 38412. An EC50 of 890 mg/L and an EC10 of 430 mg/L was assessed.

Key value for chemical safety assessment

EC50 for microorganisms:
890 mg/L
EC10 or NOEC for microorganisms:
430 mg/L

Additional information

The toxicity of 4 -Hydroxy TEMPO to microorganisms was investigated according to DIN 38412, part 8 (Pseudomonas Zellvermehrungshemm-Test). Pseudomonas were exposed to the test item for 16 hours to nominal concentrations of 313, 625, 1250, 2500, 5000 and 10000 mg/L. The EC50 based on growth inhibition was assessed at 890 mg/L. The EC10 was determined at 430 mg/L.