Process for the interconversion of two seperate crystal forms of a herbicidal pyridine sulfonamide
AssigneeE. I. Du Pont de Nemours and Company
InventorNgoc Le-Si
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Abstract
This invention relates to the interconversion of separate crystal forms of (aminosulfonyl)pyridinecarboxamides. The compounds of this invention and their agriculturally suitable salts are useful as agricultural chemicals, and in particular, as herbicides which may be selective to corn.
Claims5
A dry flowable preparation which comprises ##STR7## as the active ingredient prepared by hydrating ##STR8## or hydrating ##STR9## in the presence of heat.
An improved dry flowable herbicidal composition comprising 2[[(4,6-dimethoxypyrimidine-2-yl)aminocarbonyl]aminosulfonyl]-N,N-dimethyl -3-pyridinecarboxamide as an active ingredient and at least one of a surfactant and at least one diluent, wherein the improvement comprises use of the crystal lattice form of said active ingredient of Formula Ib ##STR10## having a water dispersibility of less than about 0.002.
An improved dry flowable herbicidal composition comprising 2[[(4,6-dimethoxypyrimidine-2-yl]aminocarbonyl]aminosulfonyl]-N,N-dimethyl -3-pyridinecarboxamide as an active ingredient and at least one of a surfactant and at least one diluent, wherein the improvement comprises use of the crystal lattice form of said active ingredient of Formula II ##STR11## having a water dispersibility of less than about 0.002.
An improved dry flowable herbicidal composition comprising 2[[(4,6-dimethoxypyrimidine-2-yl)aminocarbonyl]aminosulfonyl]-N,N-dimethyl -3-pyridinecarboxamide as an active ingredient and at least one of a surfactant and at least one diluent, wherein the improvement comprises use of the crystal lattice form of said active ingredient of a mixture of Formula Ib ##STR12## and Formula II ##STR13## having a water dispersibility of less than about 0.002.
Dependencies are inferred from the claim text.