Acetylsalicylic acid gives a water-insoluble violet complex with $$-Picolin-Cu(II) reagent. The Complex is extractable well with a mixture of $$-Picolin-tetrachloromethane solution. The Complex salt dissolved in the mixed solution shows a maximum absorption at 620 m$$. It has a melting point at $171^{circ}C-$173^{circ}C and molar ratio of Acetylsalicylic acid: Cu(II): $$-Picolin was estimated as 2:1:2 by continuous variation method and chelate titration method.