34 



IirCIKlN.Mn Ol- TlIK ACTIVK TKINCI I'LKS OK I'LANTS. 



(hydrate), or lGf<° (anhydrous). The acid salts show a blue Huorescence, 

 but the sulphate in chloroform a oreen. 



Solubility in water 1 in '2,000 cold, 1 in liiO boiling ; 1 in 'H) cold 

 alcohol of SO per cent. ; 1 in 3-7 boiling absolnte alcohol ; in ether, 1 in 

 30 at 10°, 1 in 22 at 20° (the hydrochloride 1 in 326) ; also .soluble in 

 amyl alcohol and benzeue ; very difficultly in chloroform, carbon bisulphide, 

 and petroleum ether. It is removed from alkaline solutions by benzene, 

 chloroform (with difficulty), and amyl alcohol. 

 Precipitants : 



No pp. sodium bicarbonate cold, but pp. on heating. 



Tannic acid, pp. sol. warm hydrochloric acid. 



Picric acid, amorphous pp. becoming crystalline. 



Platinum chloride, pale yellow ; insol. hydrochloric acid. 



Gold chloride, lemon pp., amorphous. 



Silver nitrate. 



Potassium ftrrocyanide, yellowish white crys. ; sparingly .soluble. 



Silver-potassic cyanide. 



Potassium bichromate, yellow amorphous ; cloud at 1 in li,O00. 



Chromic acid (;'i per cent., to neutral salt). 



Iodo-i)otassic iodide, kermes colour. 



Potassium iodide, white amorphous ; dislhictive from all. CiitclioiHt 



allcahids. 

 The hydriodide is difficultly soluble in water or alcohol. 

 Cadmium potassic iodide, pp. complete. 

 Zinc-potassic iodide. 



Mercuric-potassic iodide, limit 1 in fiO.OOO. 

 iVIercuric chloride, white amorphous. 

 Chlorine water, then ammonia, as Quinine. 

 Colour tests (negative, identical with those of Quinine) : 

 Conct-ntrated sulphuric acid i 



„ ., ,, with sugar | 



„ „ „ „ nitric aiad '- colourless. 



,. nitric acid i 



,. hydrochloric acid ' 



Friihdis solution, greenish. 



((h/) APOQUINIDINE a. (Apoconquinine), C,sH..,N,0.^ ; formed from 

 Quinidine like the corresponding Apoquinine from Quinine, a methyl 

 group being eliminated ; amorphous, alkaline, non-fluorescent ; M.P. 

 (anhydrous alkaloid) 137°. 



Soluble in alcohol and ether. 



Precipitated by alkaline hydrates and ammonia, the pp. being difficultly 

 solublii in e.\ccss. 



Gives the thalltio(iuin reaction, but not Eo strikingly as does Quinine. 



((i//) HYDROqUINIDINE A. (Hydroconquinine) ; CV„HmX.,0., + n^P : 

 found in conuntrcial Quinidine; crystallizes in prismaiic needles or platrs ; 

 M.P. KiO" Ui7°; dextro-rotatory; fluorescent (in sulphuric acid). 



Soluble readily in alcohol and chloroform, with difficulty in ether. 



Gives the thalleioquin reaction. 



((V) QUITENIDINE A., C,,,H..,N.,Oj ; from Quinidine by oxidation with 

 potassium permanganate. 



(IW) ISOQUINIDINE (Isoconquinine) ; formed like Isoquinine: crystalline 

 needles. 



Soluble in ether. 



(7) C/A/CHO/V/0/A/f .V. (Cinchovatine; Wiuckler and Hesse's Quinidine ; 

 the Homocinchonidine of Hesse, described at (7i/), is impure Cinchoni- 

 dine (Skraup), or Beta-cinchonine) ; CiaH^.^N^O (Pasteur); large glitter- 

 ing prisms from alcohol ; no crystalline hydrate ; M.P. 17.'/' 2(irr' (observers 

 differ) ; alkaline, bitter; not fluorescent. 



Soluble in 1,080 parts of water at 10°, 19 alcohol of 80 per cent., 76 

 parts ether (Leer.s' results differ from these) ; it is also soluble in chloro- 

 form, by which it is removed from alkaline solutions. 

 Precipitants ( ' No characteristic test,' Hiisemann) : 



Alkaline hydrates , ^^.^^^^, ^^, ^^ ^^^^^^ 



Ammonia S 



Alkaline carbonates. 

 „ bicarbonates. 



Rochelle salt. 



[Not neutral sodium acetate (see Opium).] 



[Not ferric chloride.] 



Platinum chloride, pale orange, scarcely soluble. 



Gold chloride, yellow ; M.P. about 100°. 



Potassium ferrocyanide, reddish-yellow crystals, sparingly soluble. 



Silver potassic cyanide. 



Chromic acid, 5 per cent, solution to neutral salt. 



[Not zinc potassic-iodide, or very slightly.] 



Mercuric chloride, crystalline, difficultly soluble. 



No thalleioquin reaction. 



