Inhibition of crystallization of O-ethyl-O-(4-nitrophenyl)-phenylphosphonothioate
AssigneeE. I. Du Pont de Nemours and Company
InventorRalph Forrest May
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Abstract
Crystallization of O-ethyl-O-(4-nitrophenyl)-phenylphosphonothioate is inhibited by maintaining therein between about 6 and about 12% by weight of bis-(O-4-nitrophenyl)-phenylphosphonothioate, optionally standardizing the active ingredient content to a predetermined level, preferably 80%, and or optionally destroying seed crystals present in the inhibited composition in order to extend the effectiveness of the crystallization inhibitor.
Claims9
A method of inhibiting crystallization of O-ethyl-O(4-nitrophenyl)-phenylphosphonothioate at temperatures in the range between (-) 6.degree. C. and 25.degree. C. comprising maintaining therein between about 6 and about 12% by weight of bis-(O-4-nitrophenyl)-phenylphosphonothioate.
Dependencies are inferred from the claim text.