4-Hydroxy, 2-Methyl-2h-1,2-Benzothiazine Carboxylic Acid Methyl Ester-1,1-Dioxide

Molecular Formula : C11H11NO5S Molecular Weight : 269.0 Appearance : Off white crystalline powder Solubility : Soluble in Chloroform Melting Range : 160A C -166A C Related Substance By TLC : No secondary spot is seen By HPLC : Not more than 1.0 % w/w Water by KF : 0.5% max Residual Solvent By HS-GC : Methanol : 500 ppm max. o-Xylene : 1000 ppm max. DMF : 880 ppm max. Assay(Dry basis) : Not less than 97% and not more than 101%