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Ecotoxicological information

Toxicity to soil microorganisms

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Description of key information

28-day EC50>100 mg/kg soil dry weight, EC10>100 mg/kg soil dry weight and NOEC ≥100 mg/kg soil dry weight, effects of the test substance on nitrogen formation rate of soil microflora.

Key value for chemical safety assessment

Short-term EC50 for soil microorganisms:
100 mg/kg soil dw
Long-term EC10 or NOEC for soil microorganisms:
100 mg/kg soil dw

Additional information

An OECD TG 216 soil microorganism test has been conducted with the registration substance according to ECHA final decision TPE-D-2114422498-44-01/F.

A 28-day EC50value of >100 mg/kg soil dry weight, an EC10value of >100 mg/kg soil dry weight and a NOEC of ≥100 mg/kg soil dry weight have been determined for the effects of the test substance on nitrogen formation rate of soil microflora, in accordance with test guideline OECD 216 and in compliance with GLP (Smithers, 2020). 

Although analytical verification of test substance concentrations was not carried out during this test, test concentrations have been measured in preliminary stability studies conducted with the registered substance, where similar methods for application of the test substance to soil were used. The measured concentrations indicated that the substance is relatively stable in soil throughout the test duration. The test organisms are therefore likely to have been exposed to concentrations of the test substance that are close to the nominal concentration.

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