Dictionary of the active principles of plants: alkaloids : bitter principles; glucosides; their sources, nature, and chemical characteristics / with tabular summary, classification of reactions, and full botanical and general indexes. By Charles E. Sohn.
- Sohn, Charles E.
- Date:
- 1894
Licence: Public Domain Mark
Credit: Dictionary of the active principles of plants: alkaloids : bitter principles; glucosides; their sources, nature, and chemical characteristics / with tabular summary, classification of reactions, and full botanical and general indexes. By Charles E. Sohn. Source: Wellcome Collection.
Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.
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![2(C9HC04)H20 ; crys. fine clino-rhombic prisms ; M.P. 253°, with subli- mate and odour of Coumarin ; feebly acid reaction, astringent taste. Soluble in hot alcohol and boiling water (yellow solution), with difficulty cold, or in ether, and not in benzene, chloroform, or carbon bisulphide. Eeactions : Alkaline hydrates 1 •,. , , „ carbonates f dissolve red. Lead acetate neutral, pp. Ferric chloride, green coloration with concentrated solutions. Silver nitrate, reduced. Fehling's solution, reduced. Concentrated sulphuric acid, on gently warming, dissolves yellow ; water reprecipitates unchanged. Nitric acid, gradually intense red. Hydrochloric acid, dissolves on warming, unchanged. (c) COCCOGNIN B., C20H22O8; crystalline ; sublimate and odour of Coumarin on heating. Soluble in alcohol, with difficulty in water, not in ether. § 89. DATISCA Cannabina ; Daliscacem. Investigators : Braconnot, Ann. Chim. Phtjs., [2] 3, 277 ; Stenhouse, Ann. Chem. Pharm., 98, 166. (a) DATISCIN G-. (formerly mistaken for Inulin), C.(1H2„On ; crys. silky needles; M.P. 186°; neutral reaction, bitter. Yields DatTscetin and sugar on treatment with acids. Soluble in alcohol and hot water; with difficulty in cold water or ether. Eeactions: Alkaline hydrates ] „ earths ^deep yellow solutions ; acids reprecipitate. Ammonia J Lead acetate neutral 1 ... „ basic f yellow pp., gelatinous. [Tannic acid, no pp.] Ferric chloride, brownish-green pp. Copper sulphate, greenish pp. Stannic chloride, pp. (b) DATISCETIN (from above),C15Hi0O6; colourless, tasteless,crystalline. Soluble in alcohol and ether ; scarcely in water. § 90. DAUCUS Carota (Carrot) ; UmbelU/erce. [CAROTIN, not bitter. Soluble with difficulty in water, but taken up by soap solution. Partlv precipitated by lead acetate.] [HYDR0CAR0TIN = Angelica bitter (Brummer); not identical with Chole- sterin, but of same class (Hiisemann); C18H30O ; crystalline ; M.P. 1265° or 137° (Reinitzer) ; neutral reaction ; not bitter. Floats on water. Soluble in hot alchol and in ether, benzene, chloroform, carbon bisul- phide, acetone. Not in cold water or cold alcohol, but in soap solution. Alkaline hydrates, no action. Concentrated sulphuric acid, ruby-red.] § 91. DELPHINIUM Staphysagria, L. (Larkspur) ; Ranunculacew. The seeds (Stavesacre seeds), substances (a) to (d). D. consolida, alkaloid (e). (a) DELPHININE A, C2.2H35N06 (?); rhombic crystals (from ether) ; alkaline reaction ; bitter and sharp taste ; M.P. variously given as 65°, 90°, 120°, 191-8° ; sublimate at 149°; very poisonous. The nitrate and sulphate are sparingly soluble in water, alcohol, or ether. Soluble in 1,594 parts cold water, 44 absolute alcohol, 53 ether, 20 ben- zene, 642 petroleum ether, and readily in chloroform. Benzene and chloroform remove it from alkaline solution, and in traces from acid solution ; petroleum removes it slowly from alkaline solutions. Precipitants : Alkaline hydrates, pp. scarcely sol. in excess. ,, carbonates. Ammonia, pp. scarcely sol. in excess. Tannic acid, pp. (cloud 1 in 3,000). Picric acid, amorphous yellow (1 in 3,000). Platinum chloride, greenish-yellow (slight at 1 in 3,000). Gold chloride, lemon-coloured pp. [Not potassium bichromate.] Phospho-molybdic acid, grayish-yellow. Iodo-potassic iodide, kermes coloured pp. (1 in 3,000). Bismuth-potassic iodide, orange-red. Cadmium-potassic iodide. Mercuric-potassic iodide, yellowish-white. Mercuric chloride, at 1 in 3,000, a cloud only at first. Iodine tincture. Colour tests: Concentrated sulphuric acid, no effect, or light brown. „ ,, „ with sugar, no effect. „ „ ,, with bromine, violet.](https://iiif.wellcomecollection.org/image/b21503023_0060.jp2/full/800%2C/0/default.jpg)
