208 



in boiling alcohol, in 8 -3 pai-ts cold and in every proportion of 

 boiling ether, in 3| parts sulphide of carbon, in 4|^ parts of benzol, 

 in 10 parts cold concentrated svilphuric acid colourless. The 

 stearates have the consistency of hard soaps and plastei's, and ai"e 

 insoluble in water, except the stearates of tlie alkalies. 



Stearin (Tri-stearin) = Ciu Hno 0^0=0 ^ H5 O3 + 3 C36 H35 

 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, i-adiated warty mass, 

 line needles and leaflets, inodorous and tasteless, of 0"986 density 

 at 15°, fuses at 62°, dissolves not perceptibly in cold, in 6-7 

 parts boiling 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. 



Stearopteus. See Essential Oils. 



Stillistearic Acid, In the fat of Excsecaria sebifera; coincides 

 with palmitic acid. 



Storax, liquid. Exl^dation of the stem of Liquidambar 

 orientalis. Dark-brown or greenish -grey, partly ash-gi-ey 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 (StyracinirCimiamate of Cimiamyl. 



Storax, solid. Exudation of the stem of Styrax ofiicinale. 

 Appears mostly as a brown, glossy, somewhat glutinous mass, 

 readily softening by the warmth of the hand, of an extremely 

 ])leasant balsamic odour, tastes sweetish-aromatic, stimulating and 

 slightly bitter, and dissolves entirely in alcohol. Consists of resin, 

 volatile oil and benzoic acid. 



StraillOlliu. Peculiar, indifferent body of the seeds of Datura 

 Stramonium, and some other species. Is obtained from the oil 

 that forms by treating the alcoholic tincture with hydrate of lime 

 and acidifying the filtered liquid, and has to be purified by re- 

 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 sul])huric acid yields a blood-red solution, diluted acids 

 or alkalies have no effect. Metallic salts produce no de})0sit. 



[Stroidiailtllill. Poisonoiis principle of the Kombi-arrow- 

 poisou of West Africa, obtained from the seeds of Strophanthus 

 hisi)idus, or another species of Strophanthus. Eraser obtained 

 the Str. from the alcoholic extract of the seeds.] 



