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Environmental fate & pathways

Phototransformation in water

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Description of key information

Photolysis of THPS showed an almost complete conversion to THPO within 2 hours both in freshwater and in synthetic seawater with maximum conversion at environmentally relevant pH.

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Additional information

Laboratory experiments with photolysis by UV of aqueous solutions of THPS (20 mg/L) showed an almost complete conversion to THPO within 2 hours both in freshwater and in synthetic seawater with maximum conversion at environmentally relevant pH.

Exposure to natural sunlight of an aqueous THPS solution of unknown concentration showed high conversion levels (not quantified) over a 3-month period.