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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Not readily biodegradable

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

The ready biodegradability of Remazol-Goldgelb RNL was tested in anaerobic bacteria by ISO 11734 method. Methane and carbon dioxide released is determined quantitatively. From the amount of carbon released into the gas is formed in a ratio of carbon used to determine the contents of the rate of anaerobic biodegradation. This test is used for the examination for ultimate anaerobic biodegradability.

A significant anaerobic biodegradation was not observed. The formation of gas within 56 days remained below 10% of the theoretical maximum.

The inherent biodegradability was tested in a Zahn-Wellens test over 28 days. No biodegradation was observed. About 30% of the test substance was eliminated via adsorption to the activated sludge.

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