2.7.5 Solubility
The solubility of various types
of resins are as follows:
1. Majority of resins are
water-insoluble and hence they have practically little taste.
2. They are usually insoluble
in petroleum ether (a non-polar solvent) but with a few exceptions, such as:
colophory (freshly powdered) and mastic.
3. Resins mostly got completely
dissolved in a number of polar organic solvents, for instance: ethanol, ether
and chloroform, thereby forming their respective solutions which on
evaporation, leaves behind a thin-varnish-like film deposit.
4. They are also freely soluble
in many other organic solvents, namely: acetone, carbon disulphide, as well as
in fixed oils and volatile oils.
5. Resins dissolve in chloral
hydrate solution, normally employed for clarification of certain sections of
plant organs.
Source:Pharmacognosy And Pharmacobiotechnology By Ashutosh Kar
Source:Pharmacognosy And Pharmacobiotechnology By Ashutosh Kar
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