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Diss Factsheets

Environmental fate & pathways

Phototransformation in water

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Description of key information

Photolysis is expected to play an important role in the degradation of KDDC in water

Key value for chemical safety assessment

Additional information

No information about the photodegradation of KDDC in water is available and therefore, conclusions on this endpoint had to be drawn based on data from an analogue substance. The photolysis of SDDC (CAS No. 128-04-1) in water was investigated by Adam (2008). This study was conducted according to EPA OPPTS Guideline 835.2210, Direct Photolysis Rate in Water by Sunlight (1998), under GLP conditions. The photolytic degradation of the radiolabelled test item (14C-SDDC) was tested in a pH 9 sterile buffer solution using artificial sunlight, resulting in a dissipation half-life of 19 hours. The major products of the photolysis of this substance were N,N-dimethylformamide, 1,1,3-trimethylthiourea and dimethylcarbamo-thioic S-acid, compounds which are eventually mineralised and released as CO2 and CS2.