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Objective: Development and validation of new, simple and reliable enantioselective reverse phase ultra-fast liquid chromatography (RP-UFLC) method for quantification of chlorthalidone in bulk and pharmaceutical dosage form.Methods: In the present study, the isocratic RP-UFLC method was developed on Phenomenex® Lux cellulose 4 column (250×4.6 mm, 5µ) and di-sodium hydrogen phosphate buffer (pH 3.6): methanol (40:60 v/v) as mobile phase. Elute was monitored at 240 nm with a flow rate of 1 ml/min.Results: The described method provided linear correlation (R2=0.999) between the range of 2-10 µg/ml. Chlorthalidone enantiomers showed good resolution with a retention time (tR) of 5.75 min and 7.46 min respectively. The precision of the method revealed that relative standard deviation is within the acceptable limit. The percentage recovery of each chlorthalidone enantiomers was found to be 99.98% and 100.09% respectively. The method was validated in accordance with ICH harmonized tripartite guidelines, validation of analytical procedures: text and methodology Q2 (R1).Conclusion: An economical, accurate, sensitive and precise RP-UFLC method was developed and fully validated for quality control analysis of chlorthalidone in pharmaceutical dosage form.

VALIDATED CHIRAL RP-UFLC METHOD FOR THE QUANTIFICATION OF CHLORTHALIDONE IN BULK AND PHARMACEUTICAL DOSAGE FORM