[ Structural formula]

[ Molecular formula ]C₁₄H₁₀Cl₂NO₂Na

[ Molecular weight ]318.13

[ Properties] white or off white crystalline powder ， Easy to dissolve in methanol and ethanol, practically insoluble in water . It is strong antiinflammation, antalgic and antipyretic drug, its function is 2.5 times of confortid & 50 times of aspirin