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Merck

Effects of paddy water and some photosensitizers on the photolysis of the fungicide isoprothiolane.

Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes (1980-01-01)
S S Chou, M Eto
ABSTRAKT

The fungicide isoprothiolane (diisopropyl 1,3-dithiolan-2-ylidenemalonate) decomposed slowly in deionized water under ultraviolet light or sunlight irradiation. Rice-paddy water greatly accelerated the photodegradation. This photosensitizing effect was comparable to that of 2% acetone. Soil extracts, rice-plant extracts, and chlorophylls showed little effect for the isoprothiolane photolysis. Tryptophan showed a relatively weak accelerating effect after a considerable lag time. Riboflavin exerted a remarkable acceleration of the photolysis. This effect was suppressed by a nitrogen gas stream.

MATERIAŁY
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Supelco
Isoprothiolane, PESTANAL®, analytical standard