Patent ID: 8163930

Claim:
Crystalline 3-chloro-N-(3-chloro-5-trifluoromethyl -2-pyridyl)-α,α,α-trifluoro-2,6-dinitro-p-toluidine (fluazinam) in a form selected from the group consisting of polymorph Form I, polymorph Form II and a mixture of polymorph Form I together with polymorph Form II, wherein the polymorph Form I is characterized by at least one of the following properties: (i) an X-ray powder diffraction pattern having characteristic peaks expressed in degrees 2θ(+/−0.20° θ) at one or more of the following positions: about 8.7, 10, 12.0, 13.7, 14.5, 17.4, 18.5, 19.7, 21.8, 22.9, and 30.2; (ii) an infrared (IR) spectrum having a characteristic peak: at about 3390 cm −1 , (iii) a single predominant endotherm at about 115.5° C. as measured by a Differential Scanning Calorimeter (DSC) at a scan rate of 10° C. per minute; and the polymorph Form II is characterized by at least one of the following properties: (i) an X-ray powder diffraction pattern having characteristic peaks expressed in degrees 2θ(+/−0.20° θ) at one or more the following positions: about 7.4,10.4, 13.4, 15.1, 18.95, 20, 20.4, 21.05, 21.3, 22.2, 24.9, 27.15, 28.6, and 30.5; (ii) an infrared (IR) spectrum having a characteristic peak at about 3375 cm −1 , (iii) a predominated endotherm at about 109° C. as measured by a Differential Scanning Calorimeter (DSC) at a scan rate of 10° C. per minute.