What is phenazone test and why it is done?

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P.V.ABHIGNA's picture

PHENAZONE test is done to identify presence of tannins(phenolic compounds). To 5ml of aqueous extract add about 0.5g of sodium acid phosphate.Warm and filter.To filtrate add 2% phenazone solution to form a colored bulky precipitate. REF:PHARMACOGNOSY:NEERALI PRAKASHAN PUBLICATIONS. 34 edition, page-597


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