The organic constituents of plants and vegetable substances and their chemical analysis / by G.C. Wittstein ; authorised translation from the German original, enlarged with numerous additions, by Baron Ferd. von Mueller.

  • Georg Christian Wittstein
Date:
1878
Catalogue details

Licence: Public Domain Mark

Credit: The organic constituents of plants and vegetable substances and their chemical analysis / by G.C. Wittstein ; authorised translation from the German original, enlarged with numerous additions, by Baron Ferd. von Mueller. Source: Wellcome Collection.

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    in boiling alcohol, in 8-3 parts cold and in every proportion of boiling ether, in 3^ pai-ts sulphide of carbon, in 4^ pai-ts of benzol, in 10 parts cold concentrated sulphuric acid colourless. Tlie stearates have the consistency of hard soaps and plasters, and ai-e insoluble in water, except the stearates of the alkalies. Stearin (Tri-stearin) = Cii4 Hno Oia^C« Hg O3 + 3 Cs« H^g 0 3. Is found principally in solid fats. Press, for instance, the shea-butter, which contains as solid fat only Stearin, and re- crystallise in hot alcohol.—White, pearly, radiated warty mass, fine needles and leaflets, inodorous and tasteless, of 0-986 density at 15° fuses at 62°, dissolves not percejitibly in cold, in 6-7 parts boilmg absolute alcohol, in 15 parts boiling alcohol of 0*805, in 66 parts boiling alcohol of 0*822 (on cooling the Stearin separates almost entirely), in 225 parts cold ether, most abundantly in boiling, readily in volatile oils. StearopteilS. See Essential Oils. Stillistearic Acid, In the fat of Excsecaria sebifera; coincides with palmitic acid. Storax, liquid. Exudation of the stem of Liquidambar orientalis. Dark-brown or greenish-grey, partly ash-grey mass of turpentine consistence, has a very pleasant balsamic odour similar to solid storax, a pungent aromatic taste, and an acid reaction.— Consists of a resin, cinnamic acid, volatile oil (Styrol), and a neutral crystalline body (Styracin~Cinnamate of Cinnamyl. Storax, solid. Exudation of the stem of Styi-ax officinale. Appears mostly as a brown, glossy, somewhat glutinous mass, readily softening by the warmth of the hand, of an extremely pleasant balsamic odour, tastes sweetish-aromatic, stimulating and slightly bitter, and dissolves entirely in alcohol. Consists of resin, volatile oil and benzoic acid. StraillOliiu, Peculiar, indifferent body of the seeds of Datui a Stramonium, and some other species. Is obtained from the oil that forms by treating the alcoholic tinctui-e with hydrate of lime and acidifying the filtered liquid, and has to be purified by r*- crystallising.—White, small, inodorous and tasteless crystals, fusible at 150°, sublimating unaltered on careful heating, insoluble in water, slowly soluble in alcohol, better in ether, also in fixed and in volatile oils and in kreosot; of neutral reaction, concen- trated suljihuric acid yields a blood-red solution, diluted acids or alkalies have no effect. Metallic salts produce no deposit. [Strophailtllill. Poisonous principle of the Kombi-arrow- poison of West Africa, obtained from the seeds of Stropliantlius hispidus, or another species of Strophantlius. Eraser obtained the Str. from the alcoholic extract of the seeds.]