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Environmental fate & pathways

Phototransformation in water

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Photolysis of OPP (CAS-No. 90-43-7) in water was investigated in two phototransformation studies conducted by Heinemann (2005) and Wick and Gschwend (1998). The first study on photolysis of OPP in water conducted by Heinemann, follows several current standard methods (US-EPA Series 161-2, Canadian and SETAC guidelines). OPP is rapidly photodegraded (experimental DT50 = 0.3 days). In the other study the photodegradation rates of OPP under natural sun light in pure and contaminated lake water showed DT50 values of 5.3 and 4.6 days, respectively).