Visualizing reagents for the identification and the examination of the identity of diclofenac

Diclofenac sodium is often used drug with a strong anti-inflammatory, analgesic and antipyretic effect, belonging to NSAID. Diclofenac sodium was detected on plates precoated with silica gel 60F254. Nineteen new visualizing (known as dyes) namely: brilliant cresyl blue, malachite green, alkaline blue, methylene blue, methylene violet, Janus blue, bromophenol blue, brilliant green, methyl green, methyl red, bromocresol green, bromothymol green, gentian violet, crystalline violet, aniline blue, neutral red, titan yellow, thymol blue, bromothymol blue were used to detected diclofenac sodium. Rhodamine B and fuchsine were used as comparative visualizing reagents for detection of diclofenac sodium. Among all studied new visualizing reagents, brilliant-cresol blue, malachite green and titan yellow are the best to detect diclofenac sodium. Similar detection and quantitative limit values of diclofenac sodium were obtained without using visualizing reagent and after detection using the following reagents: fuchsin, alkaline blue, Janus blue, methylene blue, aniline blue and crystal violet. The coloured spots and spectrodensitograms of diclofenac sodium obtained after the use of individual visualizing reagents can be an additional parameter in studying its identity.