C SHUANGZUOCAOTONG CRYSTALLINE FORM, METHOD FOR PRODUCTION THEREOF AND USE THEREOF Russian patent published in 2021 - IPC C07D403/12 A01N43/56 A01P13/00 

FIELD: chemistry.

SUBSTANCE: invention relates to organic chemistry and specifically to crystalline form C shuangzuocaotong, characterized in that crystalline form C has an X-ray powder diffraction pattern having characteristic absorption peaks at following positions 2θ: 10.159, 10.658, 13.318, 14.579, 16.096, 18.061, 19.322, 19.68, 20.04, 20.659, 21.281, 23, 24.16, 24.619, 26.101, 26.74, 30.359, 31.018, 32.378, 35.398 and 38.26 degrees, where 2θ has error interval within ±0.2°; where shuangzuocaotong is compound of 4-[2-methenesulphonyl-4-trifluoromethylbenzoyl]-1,3-dimethyl-1H-pyrazol-5-yl ester of 1,3-dimethyl-1H-pyrazole-4-carboxylic acid. Invention also relates to a method of producing crystalline form C, an herbicidal composition based thereon and use of crystalline form C or an herbicidal composition.

EFFECT: technical result: obtaining crystalline form C 4-[2-methenesulphonyl-4-trifluoromethylbenzoyl]-1,3-dimethyl-1H-pyrazol-5-yl ester of 1,3-dimethyl-1H-pyrazole-4-carboxylic acids, having good stability and high efficiency for control of broadleaf weeds and gramineous weeds in wheat.

9 cl, 2 tbl, 2 ex, 2 dwg