TIAMETOXAM E USOS DO MESMO

IPC Classification

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Abstract

1/1 RESUMO TIAMETOXAM E USOS DO MESMO A crystalline form of 3-(2-chloro-1,3-thiazol-5-ylmethyl)-5-methyl1,3,5-oxadiazinan -4-yledene (nitro)amine (thiamethoxam) is provided. The crystalline form exhibits an X-ray powder diffraction pattern having characteristic peaks (expressed in degrees 2. +/- 0.2° .) at one or more of the following positions: 6.09, 15.37, 17.83, 18.43, 20.86, 22.01, 26.95 and 27.84, and an Infrared (IR) spectrum having characteristic peaks at about 2933.62, 2161.78 and 1593.88 cm-1 . A method of preparing the crystalline form comprises crystallizing 3-(2-chloro-1,3-thiazol-5-ylmethyl)-5-methyl-1,3,5-oxadiazi nan -4-yledene (nitro)amine (thiamethoxam) from a solvent system comprising a solvent selected from an alcohol, a glycol, an ether, a ketone, an ester, an amide, a nitrile, an aliphatic or aromatic hydrocarbon, or mixtures thereof; and isolating the resulting crystals.