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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    Siliapill Sull)h0Cyaili(le=C32 H23 NOii + C2 NS2 H. Ob- served in the seeds of Brassica alba, B. nigra and Arabis perfoliata. Free the pulverised seeds completely from the fixed oil by means of ether, exhaust with absolute alcohol (which dissolves a little sinapin), boil the remnant with alcohol of 90%, press, repeat the operation twice, and distil the tinctures, when the Sinapin-Sulpho- cyanide will crystallise from the remaining liquid.—It appears in white, very voluminous, pearly, tuftily united needles, is inodorous, has a bitter and mustard-like taste; is of neutral reaction, fuses at 130°, decomposes by more heat, dissolves in water and in alcohol with yellow colour, more readily when warm, the solutions be- coming colourless with even traces of an acid; is insoluble in ether, sulphide of carbon and oil of tui'pentine, reddens the salts of oxyd of iron. [According to Will, Sinapin-sulphocyanide, or more properly called Sinalbin, has the composition Ceo H44 K 2 S 4 O32. When placed into contact with water and myrosin, it breaks up into Sulphocyanate of Acrinyl, Sulphate of Sinapin and sugar.] Siliapisill, According to Simon, a fat occurring in the black mustard-seeds, and not saponifiable. Treat the pulverised seeds with alcohol of 94%, evaporate the tincture to honey consistence, treat with ether, evaporate the ethereous liquid to honey consist ence, remove sugar, oil, and resm by washing with small quanti- ties of ether, dissolve the residue in alcohol of 90%, decolourise the solution by means of animal charcoal, filter and evajjorate. B,e- crystallise the scaly crystalline mass in ether.—Forms snow-white scales, dissolves readily in alcohol, ether and oils, not in acids or in alkalies; may be sublimated. Siiiigrin = Myronate of Potassium. Sipirin. As to occurrence and prej)aration see Bebirin. Dark- red-brown, glossy, resinous mass, dissolves very slightly in water, readily in alcohol, not in ether, neutralises the acids, forming olive- brown salts.—Is, according to Tilley, impure Bebirin. Sniilacill=:C42 II34 O14. In the sarsaparilla, in the quina- root, and in other species of the genus Smilax. Boil with water, precipitate the decoction with hydrochloric acid, wash the deposit and dissolve in diluted sulphuric acid, precipitate with ammonia, and purify, if necessary, by redissolving in alcohol and treating with animal charcoal. Or, draw out with alcohol, precipitate the tincture with water, wash the deposit with ether, dissolve in alcohol, and decolourise with animal charcoal.—White warty mass or loose powder, permanent at the air, inodorous, of a bitter and acrid, somewhat astringent and nauseous taste, of neutral reaction, fuses by heat, and decomposes in higher temperatures, dissolves- scarcely in cold, more copiously in hot water, yielding a froth by shaking; little soluble in cold, most readily in boiling alcohol, to