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Ecotoxicological information

Toxicity to soil microorganisms

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Description of key information

Key value for chemical safety assessment

Short-term EC50 for soil microorganisms:
528 mg/kg soil dw

Additional information

A nitrogen transformation test according to test guideline OECD 216 has been performed to examined soil microorganisms. Test substance concentrations up to 1000 mg/kg sdw has been incorporated into natural soil and the soil microorganisms were exposed for 28 days.

After 28 days of exposure, a significant inhibition of the microbial nitrate transformation was observed for the test item concentrations 250, 500 and 1000 mg/kg soil dry weight.

The no effect level (NOEC) has been determined to be 125 mg/kg sdw after 28 days exposure. The EC10 value for inhibition of the nitrate-N formation rate in soil has been calculated to 237 mg/kg sdw , the EC25 value has been 361 mg/kg sdw and the EC50 value has been determined to be 528 mg/kg sdw after 28 days.