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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

The half life period of clioquinol in water is 38 days and based on this value it can be concluded that the chemical is not persistent in water medium since the half life is less than the threshold of 60 days (to qualify the chemical as persistent).

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

The half life period of clioquinol in water is 38 days and based on this value it can be concluded that the chemical is not persistent in water medium since the half life is less than the threshold of 60 days (to qualify the chemical as persistent). Also the diffusion percentage ofclioquinolin water medium is 11%. This coupled with the dilution of water shall result in ready biodegradabililty of the chemical.

The supporting study also shows the half life of clioquinol to be 900 hrs (37.5 days) indicating thet it is readily biodegradable

Media

Half-Life 
(days)

Percent in
Medium

Water

38

  11%

 

Media

Half life

(hrs)

Percent in Medium

Emission

(kg/hr)

 

Water

900

10.8

1000