Tannin Containing Drug Part 03 Pale catechu Source Preparation Method Chemicals and Uses

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Download Solution Pharmacy Mobile App to Get All Uploaded Notes, Model Question Papers, Answer Papers, Online Test and other GPAT Materials - https://play.google.com/store/apps/de... • 1.Introduction to Tannin by Solution Pharmacy in Hindi • Class (56) = Tannin (Part 01) | Intro... • 2. Classification of Tannin by Solution Pharmacy in Hindi • Class (58) = Tannin (Part 03) | Types... • 3. Tannin Containing Drug (Part 1)- Pterocarpus by Solution Pharmacy • Tannin Containing Drug (Part 01) = Pt... • 4. Chemical Identification test for Tannin (Qualitative test) by Solution Pharmacy in Hindi • Class (59) = Tannin (Part 04) | Chemi... • 5. Tannin Containing Drug (Part 2)- Black Catechu in Hindi by solution Pharmacy • Tannin Containing Drug (Part 02) = Bl... • PALE CATECHU • Gambir or pale catechu is a dried, aqueous extract prepared from the leaves and young twigs of a climbing shrub, Uncaria gambir (Rubiaceae). The plant is a native of Malaya and it is largely cultivated for the production of the drug in Indonesia and Malaya for marketing through Singapore. • Preparation • It consists of extracting the leaves and young twigs with boiling water, evaporating the extract to a pasty consistency and dividing it into cubes, which are then sun-dried. • Macroscopical characters • Reddish-brown surface often stamped with a maker’s mark. Internally, both varieties are cinnamon-brown and porous. Odorless, taste very astringent and at first somewhat bitter, afterwards sweetish. • Chemical tests • 1. For gambir-fluorescin. Extract a little of the powdered drug with alcohol and filter. To the filtrate add solution of sodium hydroxide. After shaking, add a few millilitres of light petroleum, shake again and allow to stand. The petroleum spirit layer shows a strong green fluorescence. • 2. For catechin. This is a modification of the usual test for lignin. Phloroglucinol is formed from catechin and with hydrochloric acid turns a matchstick red. • Constituents • Gambir contains about 7.33% of catechins, 22–50% of catechutannic acid, catechu red, quercitin and gambir-fluorescin. Catechutannic acid is an amorphous phlobatannin which appears to be formed from catechin by loss of the elements of water. It readily yields the phlobaphene catechu-red. The drug may be distinguished from gambir as it gives no reaction for gambir-fluorescin. • Uses • Catechu is used in medicine as an astringent. Dyeing and tanning industry. • Get in touch with the solution by just clicking following links- • Facebook Group- / solutionpharamcy • Facebook Page- / pharmavideo • New channel (Pharmacy Dictionary) - / @pharmacydictionary • Instagram- / solutionpharmacy • E-Mail for official and other work - [email protected] • LinkedIn- / pushpendrakpatel • #solutionpharmacy #Pharmacologyclass #GPATonlinetest

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