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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Citrowanil B is biologically not “ready degradable” by the Closed Bottle Test OECD 301 D.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

The Chemical Oxygen Demand COD of Citrowanil B gives 2633 mg O2/g substance. The Theoretical Oxygen Demand TOD gives 2635 mg O2/g substance and confirms the COD determination. The determination of the Biochemical Oxygen Demand BOD does not show an increasing oxygen consumption over the incubation period.

The result is, that Citrowanil B is biologically not “ready degradable” by the Closed Bottle Test OECD 301 D.

 

The test controls document the correct run of the Closed Bottle Test.

The inhibition test does not show any inhibitory effects on the development of the microorganisms. The controls of the COD- and BOD-determination give value within the range of variation of the reference standards. The biological degradability of sodium acetate is 84,4% (BOD/COD) which is clearly above the 60%-level.