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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

The test material attained 27% degradation after 28 days and therefore cannot be considered to have the potential for biodegradation in the marine environment under the terms and conditions of OECD Guideline No 306.

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Additional information

A study was performed to assess the biodegradability of the test material in an aerobic aqueous medium. The method followed that described in the OECD Guidelines for Testing of Chemicals (1992) No 306, "Biodegradability in Sea Water; Closed Bottle Test" and US EPA Fate, Transport, and Transformation Test Guidelines OPPTS 835.3160.

The test material, at a concentration of 10 mg/l, was exposed to marine microorganisms with test medium in sealed culture vessels in the dark at a temperature of approximately 20°C for 28 days. The degradation of the test material was assessed by the determination of the amount of oxygen consumed. Control solutions containing the standard material, sodium benzoate, together with a toxicity control were used for validation purposes.

The test material attained 27% degradation after 28 days and therefore cannot be considered to have the potential for biodegradation in the marine environment under the terms and conditions of OECD Guideline No 306.