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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

The degradation of the test item can be measured only for the organic compound acetate and not for the element Chromium. The organic compound is readily biodegradable.

Key value for chemical safety assessment

Additional information

In general biodegradation in water, sediment and soil is not an applicable endpoint for pure inorganic substances. However, in a GLP guideline study conducted according to OECD 301A Muckle & Paulus (2008) investigated the biodegradation potential of acetic acid, chromium salt, basic. Since the substance is a metal salt with an organic counter ion, results on biodegradation obtained in this study, solely refer to the organic part of the substance and not to chromium, i.e. acetic acid. Results are based on the removal of dissolved organic carbon. The 10-day-window started on day 1, on day 9, 92% was reached, surpassing the pass level of 70% stated in the OECD Guideline. The degree of biodegradation reached 92% after 9 days. As a plateau had been reached and no further degradation was likely to take place, the test was ended. Thus the organic compound can be considered to be readily biodegradable.