Isolation and Extraction of Medicinally Useful Dye from the Roots of Arnebia nobilis Rech. f., Using Different Solvents

Abstract

Root of Arnebia nobilis, a native of Afghanistan but available

freely in India, is the source of medicinally useful dyes. It serves

as colouring matter as well as for the treatment of certain ailments.

Using the various solvents for extraction, viz., water, methanol

(reflux and cold), aqueous caustic soda, caustic soda extract neutralized

with HCl, and n-hexane, the dark brown solid (brownish orange

solution), red-black solid (crimson red and maroon solutions), black

semi-solid (deep blue solution), chocolate coloured solid (deep blue

solution), and dark red viscous substance (dark red solution) respectively

are obtained, expected to have varied medicinal value.