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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

The substance is readily biodegradable according to OECD criteria.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

Several biodegradation tests are available for alpha olefin sulfonates, the tests were conducted in freshwater medium and also with saltwater as inoculum.

The key study investigates the biodegradation of Sulfonic acids, C14-16 (even numbered)-alkane hydroxy and C14-16 (even numbered)-alkene, sodium salts in a modified Sturm test according to OECD guideline 301B using domestic activated sludge as inoculum. After 28 days the test substance was degraded by 80 % (Bazzon, 1997). Hence, the test substance is readily biodegradable according to OECD criteria.

Further, the biodegradation rates in all tests were above the trigger values for ready biodegradation indicating that the test substance is readily biodegradable in freshwater as well as in marine compartment.