Specification: Appearance:white needle crystal Assay:99.0%min Moisture:0.20%max 2,6-Difluorobenzonitrile;0.10%max 2-Chloro-6-fluorobenzamide:0.20%max 2-fluorobenzamide:0.10%max 1,2,3-trichlorobenzene:0.10%max Solubility (1g+5ml methanol):Clear