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Ecotoxicological information

Toxicity to soil microorganisms

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Description of key information

The carbon mineralization was not significantly reduced by sodium chlorate.
For nitrogen mineralization a NOEC of 0.333 g/kg can be used.

Key value for chemical safety assessment

Long-term EC10 or NOEC for soil microorganisms:
333 mg/kg soil dw

Additional information

One test with soil was found and considered to be valid.

Facultative anaerobic bacteria are responsible for that 350 mg/kg were reduced in the 1.67 g/kg treated group. These bacteria compete with aerobic nitrating bacteria for organic carbon in soil. Thus a possible explanation for that nitrogen mineralization was lower than in the control, is that the high reducing activity led to exhaustion of the available organic matter. As a consequence, the activity of the nitrating bacteria was reduced.

The carbon mineralization was not significantly reduced by sodium chlorate.

For nitrogen mineralization a NOEC of 0.333 g/kg can be used.