Dermal toxicity of solid compositions containing a montmorillonite type of clay and an organophosphorus pesticide
AssigneeAmerican Cyanamid Company
InventorAlexander David Lindsay
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Abstract
There is provided a composition comprising (a) a major amount of a calcined granular carrier of montmorillonite type of clays and (b) a minor amount of a broad spectrum insecticide-nematocide, namely, 0,0-diethyl S-[(1,1-dimethylethyl)thio]phosphorodithiorate, wherein said composition is distinguished by decreased mammalian dermal toxicity in contrast to conventional solid compositions containing the above-identified insecticide-nematocide.
Claims3
A composition possessing good insecticidal or nematocidal activity and low mammalian toxicity comprising (a) from 80% to 95%, by weight, of a montmorillonite type of clay consisting of 2:1 type of crystal lattice and containing 68% to 72.5%, by weight, of silica (Si0.sub.2), 5% to 7%, by weight, of iron oxide (Fe.sub.2 0.sub.3), 11% to 15%, by weight, of aluminum oxide (Al.sub.2 0.sub.3), said clay being calcined at a temperature range from about 600.degree. to about 1300.degree. F, and (b) from 20% to 5%, by weight, of O,O-diethyl S-[(1,1-dimethylethyl)thio]phosphorodithioate.
Dependencies are inferred from the claim text.