Page 159 - Pharmacognosy-II (06-PG 303)

Resins and resin combinations

-They are insoluble in water, but soluble in alcohol.
-They Burn with smoky flame (due to high carbon content).
-Chemically, they are very complex substances of different chemical
constituents:
Resinolic acids, resinophenol, resinol, esters or neutral inert compounds.

• Resin ex: colophony, guaiacum
• Oleoresin: resin + v.oil can be separated by steam distillation. Ex: Mastic
• Gum-resin: gum + resin can be separated by boiling with water.
• Oleo-gum-resin: v.oil + gum + resin. Ex: olibanum
• Balsams: resinous substances containing balsamic acids. Ex: Benzoin

Resins
Colophony (Rosin)

It is the dried resin left after distilling the volatile oil from the oleo-resin
obtained from Pinus palustris f. Pinaceae.
N.B. the oleo-resin is: turpentine.

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