Spectrophotometric Determination of ChlorpromazineHydrochloride in Pharmaceutical Preparations by Oxidative Coupling reaction.

An easy and simple spectrophotometric method was described for estimating chlorpromazine hydrochloride drug in aqueous solution. where the method was adopted on oxidative coupling reaction of the drug with p- nitro aniline in the presence of ceric(iv) ammonium nitrate and hydrochloric acid solution an orange-brown product dye was obtainded with maximum absorption at 525 nm. with moler absorptivity of 9.24×103 l. mol-1. cm-1 and sandell's sensitivity of 0.0385 µg.cm-2 beer's law is obeyed over the concentration range of (12-46) µg.ml-1. the method was applied successfully for the estimating the drug it's on pure condition or in pharmaceutical preparations (largactil drug).