DICTIONAUY OF THE ACTIVE riU.N'ClPLES OF PLANTS. 



2(Ci|HsOj)Jl20 ; cry s. fine cliiio rhombic piisras ; M.P. 253°, with subli- 

 mate and odour of Conniarin ; feebly acid reaction, astrinjjent taste. 



Soluble in hot alcohol and boiling water (yellow solution), with 

 difficulty cold, or iu ether, and not iu benzene, chloroform, or carbon 

 bis-ulphide. 



Reactions : 



Alkaline uydiates ) j- . . 



„ carbonates )'^'^'*°'^« '•«''• 

 Lead acetate neutral, pp. 



Feiiic 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 ncid, 'gradually intense red. 

 Hydrochloric acid, dissolves on warming, unchanged. 

 ('■) COCCOGNIN B., CjoHooOs ; crystalline ; sublimate and odour of 

 Conmarin on heating. 



Soluble in alcohol, with difficulty in water, not in ether. 

 § 8;i. DATISCA Cannabina ; Dulisrmriv. Investigators : Braconnot, 

 Anil. Chilli. I'lii/.<:., [^] 3, 277 ; Stenhouse, Ann. Cliem. J'hai-m., 98, 1G6. 



(a) DATISCIN G. (formerly mistaken for Inulin), C._,,H2.,0i, ; crys. silkv 

 needles; M.P. 180°; neutral reaction, bitter. Yields Datfscetin and sugar 

 on treatment with acids. 



Soluble in alcohol and hot water; with difficulty in cold water or ether. 

 Reactions : 



Alkaline hydrates "j 



„ earths -deep yellow solutions ; acids reprecipitate. 

 Ammonia J 



Lead acetate neutral ) ,, ... 



basic f JL'l'ow pp., gelatinous. 



[Tannic acid, no pp.] 

 Ferric chloride, brownish-green pp. 

 Copper sulphate, greenish pp. 

 Stannic chloride, pp. 



(b) DATISCETIN (from above), C,gH,„Os ; colourless, tasteless, crystalline. 

 Soluble in alcohol and ether ; scarcely in water. 



§ 90. DAUCUS Carota (Carrot) ; Uinbellifera: . 



\CAROTIN, not bitter. Soluble with difficulty in water, but taken up by 

 soap solution. Partly precipitated by lead acetate.] 



[HYDROCAHOTIN = Anae]\<:ii bitter (Bniramer); not identical with Chole-, 

 steiiri, but of sameclai-s (Hiiseiuann) ; C„H,,|,<); crysialline ; M.P. 126'5° 

 or \'M (Keiuitzer) ; neutral reaction ; nut bitter. Floats on water. 



Soluble in hot alchol and in ether, benzene, chloroform, curbon hisul- 

 phiile, acetone. Xot in cold water or cold alcohol, but in suap solution. 



Alkaline hydrates, no action. 



Concentrated sulpliuric acid, ruby-red ] 



§ 1)1. DELPHINIUM Staphysagria, L. (LarksDur) ; liaNinicnlor'n-. The 

 seeds (Stavesacre seeds), substances (</) to (</). D. consolida, alkaloid (c). 

 (.) DELPHININE A., C.j.,H35NOa (?) ; rhombic crystals (from ether); 

 alkaline reaction ; bitter and sharp taste : M.P. vaii'iuslv given as 05°, 

 90°, 120°, 1918° ; sublimate at 149° ; very poisonous. The nitrate and 

 sulphate are spaiingly soluble in water, alcohol, or ether. 



Soluble iu l.."i94 parts cold water, 44 absf>lute alcohol, bi ether, 20 ben- 

 zene, (Jt2 petr< leuni ether, and readily in chloroform. 



Benzene and chloroform remove it from alkalin-' solution, apd 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 (I in 3,000). 

 Platinum chloride, greenish-yellow (slight at 1 in 3,000). 

 <Tf.ld chloride, lemon-coloured pp. 

 [Xot potassium bichromate.] 

 Pliospho-raolybdic acid, grayish ycl'ow. 

 lodo potassic iodide, kermes coloured pp. (1 in 3,000). 

 Bismutli-potassic iodide, orange-red. 

 Cadmium-potassic iodide. 

 Mercuric-pota^sic iodide, yellowish-white. 

 Mercuric chloride, at 1 iu 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. 



