Utility of chromogenic property of 2, 2-dihydroxyindane-1, 3-dione for quantification of Memantine hydrochloride in pure, pharmaceutical preparation and application to uniformity testing.

Accurate, simple, sensitive, and fast spectrophotometric assay was applied for the quantification of certain anti-Alzheimer drug namely; Memantine hydrochloride, in its bulk and pharmaceutical preparation. The described assay has been established on the reaction between the primary amino moiety of the cited drug and 2,2-dihydroxyindane-1,3-dione reagent in N,N'-dimethylformamide medium in boiling water bath. Which give Ruhemann's purple color that can be determined at λmax = 595 nm. Beer's law has been obeyed within drug concentration range from 10-120 µg per milliliter. Detection limit and quantitation limit have been 1.6 & 4.9 µg per milliliter respectively. Developed procedure has been validated in agreement with International Conference of Horizon recommendations and applied successfully for detection of cited drug in bulk, pharmaceutical dosage form and content uniformity testing.