Resins alcohol-soluble principles

Resins Solid preparations consisting chiefly of the resinous principles from vegetable bodies. The officially prepared resins differ from alcoholic extracts in that the latter contain all of the alcohol-soluble principles in the drugs, whereas the resins contain only the alcohol-soluble principles that are insoluble in water. The term probably arose from the Greek rheos, to flow, referring perhaps to the flow of pine resin commonly observed. ... 

This resin is soluble in the cold in alcohol, ether, benzol, turpentine, bisulphide of carbon, and ebloro form all these liquids, when evaporated, leave as residue the amorphous resin. Dilute acids, concentrated alkaline solutions, and ammonia, do not attack the yellow resin. Monohydra tod sulphuric and nitric acids act upon it rapidly, producing phenomena analogous to those exhibited with the other two principles. Hydrochloric acid, even in ite sate rated solution at 68°, a without action upon it. But the most remarkable character of this resin Is the power of forming, under the circumstances already indicator , those globose crystals covered with a white pellicle of anothor resin, and presenting In their complex form the appearance of opaline spherules. 

Myrrh. Gum-resin myrrh. From Commiphora abyssinica (Esrg) Eng. or from other species ol Commiphora, Burseraceae. Yields not less than 30% alcohol-soluble extract. Habit. Nutria, Somaliland, Arabia. ConniJ. 20-25% resin, 57-61% gum, 7-17% volatile oil and a bitter principle. 

Composition.—Its cathartic principle is a resinous body, soluble in alcohol, insoluble in water. 

Podophyllin or podophyllum resin is the alcohol-soluble and water-insoluble resinous material present in podophyllum in 3-6%. Due to the method of preparation, podophyllin generally contains little or no lignan glucosides. Most of the active principles present are the lignan aglycones consisting of about 20% podophyllotoxin, 13% P-peltatin,... 

Kauri-butanol number A measurement of solvent strength for hydrocarbon solvents the higher the Kauri-butanol (KB) value, the stronger the solvency the test method (ASTM D1133) is based on the principle that Kauri resin is readily soluble in butyl alcohol but not in hydrocarbon solvents and that the resin solution will tolerate only a certain amount of dilution and is reflected as cloudiness when the resin starts to come out of solution solvents such as toluene can be added in a greater amount (and thus have a higher KB value) than weaker solvents such as hexane. 

The proximate principles of elemi are a transparent resin having acid properties, soluble in cold alcohol a second rosin taken up by boiling alcohol, bat deposited from the solution on eoolingin a crystalline state , a volatile colorless oil, which, according to Deville, resembles much the essence of turpentine, and of citron in composition, as in its reactions and a bitter extractive. The annexed per centages wore found by BoNAsrnE —... 

Essential oils are odorous principles stored in special plant cells— glands, glandular hairs, oil ducts or resin ducts—situated in any part of a plant or its exudations. These oils are responsible for the distinctive aromas associated with individual plant species. They are soluble in alcohol and fats, but only slightly soluble in water. Most essential oils are colourless, apart from azulene, which is blue. On exposure to light and air they readily oxidise and resinify. They are also called volatile oils, since they evaporate when subjected to heat. 

The solution technique uses water soluble solvents, such as alcohols, (e.g. butanol, propanol) glycol ethers (e.g. butyl glycol), and acetates of glycol ethers (e.g. Dowanol range), following the same principles and techniques used for conventional solvent based systems. The two major differences are the inclusion of a functional comonomer, to induce water dispersibility, and neutralisation and dispersion after polymerising the resin in solution. 

---