Class (66)= Natural Resin (Part 03) | Types of Resins | Classification of Resins (Part 01)

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1. Introduction to Natural Resin- Part 1 by Solution Pharmacy in Hindi    • Class (64) = Natural Resin (Part 01) | Int...  
2.Physical and Chemical Properties of Resin by Solution Pharmacy in Hindi    • Class (65)= Natural Resin (Part 02) | Prop...  
INTRODIUCTION
Resins are amorphous mixtures of essential oils, oxygenated products of terpene and carboxylic acids found as exudations from the trunk of various trees. They are transparent or translucent solids, semi-solids or liquid substances containing large number of carbon atoms. Most of the resins are heavier than water. They are insoluble in water, but soluble in alcohol, volatile oils, fixed oils, chloral hydrate and non-polar organic solvents like benzene or ether. They are usually formed in schizogenous or schizolysigenous cavities or ducts as end products of metabolism.

CLASSIFICATION OF RESINS
Chemical Classification: The resins may also be classified as per the presence of the predominating chemical constituents for instance:
1. Acid Resins: e.g., Colophony (Abietic acid); Sandarac (Sandracolic acid); Shellac (Alleuritic acid); Myrrh (Commiphoric acid);
2. Ester resins: e.g., Benzoin (Benzyl benzoate), Storax (Cinnamyl cinnamate);
3. Resin Alcohols: e.g., Balsam of Peru (Peruresinotannol), Guaiacum resins (Guaicresinol); Gurjun balsam (Gurjuresinol);
4. Resene Resins: e.g., Dragon’s Blood (Dracoresene); Gutta-percha (Fluavil);
5. Glycoresins: e.g., Jalap resin from jalap i.e, Ipomea purga Haynel; (Family: Conrulvulaceae) Podophylloresin from the dried roots and rhizomesof Podophyllum hexandrum (P.emodi) Royle. (Family Berberidae)

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