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Ecotoxicological information

Toxicity to soil macroorganisms except arthropods

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Link to relevant study record(s)

Description of key information

Several studies, collectively, provide a weight-of-evidence to support the acute and long-term toxicity to soil macro-organisms are reported in the EU RAR.

Key value for chemical safety assessment

Additional information

Once released into soil, it is likely that much of the chromium (VI) present will be reduced to chromium (III). Toxicity data are available for chromium (VI) in soil, but it is also likely that in these experiments the majority of the chromium present will be converted to chromium (III) during the test. Chromium (III) has generally been shown to be less toxic than chromium (VI) to soil organisms. For Cr(VI) LC50 and EC50 values were 146 and 792 mg Cr(VI)/kg dry soil. An NOEC value of 32 mg Cr(III)/kg dry soil was observed.