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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

A study according to OECD 301D was performed to assess the ready biodegradability of Salicynalva.  Sealed bottles containing the test substance (adsorbed onto glass filter paper) and inorganic nutrient medium were inoculated with activated sewage sludge bacteria and incubated for up to 28 days at 20 ± 1 °C. On Days 0, 4, 7, 11, 14, 18, 21, 25 and 28 duplicate bottles were taken and dissolved oxygen measurements were performed electrochemically. Percentage biodegradation values were determined by comparing the extent of oxygen depletion with the Theoretical Oxygen Demand (2.77 mg 02/mg). Additional bottles, containing both the test substance and a readily biodegradable standard substance were prepared in order to provide additional information on the inhibitory effect of the test substance. Salicynalva attained no biodegradation after 28 days and may not be termed as readily biodegradable. Salicynalva was not found to be inhibitory to activated sewage sludge bacteria under the conditions of this test.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information