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II- Drugs Containing Cardiac Glycosides - page 25 / 25

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Morphology: subspherical, 12-20 mm in diameter, external surface is bluish green to olive green in colour, showing blunt short projections. Internally it is buff in colour.

Active constituents: 50-70% pyrogallol tannin: gallotannic acid, gallic acid and ellagic acid.

Uses: Medicinally: astringent, haemostatic used in treatment of hemorrhoids in form of supp. or oint.

Industrially:  1- in manufacture of ink and paints

            2- in tanning of leather.

Chemical test: FeCl3 → bluish black colour.

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