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Environmental fate & pathways

Phototransformation in water

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Description of key information

Half-life (water surface): >= 9.2 days

Half-life (whole water column): >= 2.1 years

Key value for chemical safety assessment

Additional information

One literature study regarding the phototransformation of DMAC in water is available (Dorfman 1973/Zepp et al. 1987). The degradation in surface water was analyzed at lake Greifensee in Switzerland. A half-life for the water surface (average OH radical concentration 2.5E-16 mol/l) of >= 9.2 days and and for the whole water column (depth = 14 m) of >= 2.1 years (average OH radical concentration 3.0E-18 mol/l) was determined.