74 



DICTIONARY OF THE ACTIVE rKINCll'I-ES ol' 1'1,AXT> 



Colour tests : 



Concentrated sulphuric acid, yellow. 



„ ., „ with nitric acid, red. 



,, nitric acid, red. 



(14) CODAMINE A„ C.,„H.j5N04 (Hesse) ; crystallizes in six-sided prisma 

 from ether ; M.P. 121, with decomposition and crystalline sublimate; 

 hitter taste, alkaline reaction. Salts amorphous. 



Soluble in alcohol, ether, chloroform, benzene (very readily in last two 

 solvent.s), and in boiling water (difficultly cold). 

 Reactions : 



Alkaline hydrates, pp., soluble in e.xcess. 



., bicarbonates, pp., becoming resinous. 

 Concentrated sul|ihuric acid, green. 



„ nitric acid, green cold, violet hot. 



(15) W£CO/V/D//Vf A., C„,H„3N04 (Hesse) ; brownish-yellow, amorphous ; 

 M.P. ,"i8 ; alkaline reaction, tasteless (salts are bitter). Readdy decom- 

 posed by acids. Salts very soluble. 



Soluble in alcohol, ether, chloroform, benzene, acetone ; not in water. 



Not removed by immiscible solvents from solution in caustic alkali, but 



from an ammouiacal or calcic hydrate solution. 



Precipitants : 



Alkaline hydrates, soluble. 



Amniduia ) , , i ■,, in; n 

 , ■„ . soluble with ditnculty. 

 Lime-water \ ■' 



Platinum chloride, yellow amorphous, changing to red. 

 Gold chloride, dirty yellow amorphous. 

 Colour tests : 



Concentrated sulphuric acid, olive-green. 

 ,, nitric acid, reddish colour. 



Acids in general, decompose readily ; dilute sulphuric acid gives 

 jjiadual red, then purple (ammonia gives with this solution a white 

 ]ip.). Only slight decomposition with acetic acid. 

 ( I I'l) LANTHOPINE A.. C.,-|HojNOj (Hesse) ; microscopic prismatic crystals ; 

 browns on heating to 1 ',IU"-'J(J(1° ; alkaline reaction, tasteless. Salts crystal- 

 line, but sometimes gelatinous. 



Soluble in chloroform, with difficulty in alcohol, ether, or glacial acetic 

 acid, scarcely in benzene ; not in water. 



Removed by chloroform from an ammoniacal, but not from a solution 

 containing caustic soda or potash. 

 Reactions : 



A Ikalinehydratesdissolve (ammonium chloride precipitates therefrom). 



Ammonia, pp., insoluble. 



[fiold chloride salt, M.P. 1S2'.] 

 Colour tests : 



Concentrated sulphuric acid, colourless or jiale violet : brown on 

 heating to liil)'. 



Concentrated nitric <icid, resinifies, then dissolves yellow to red. 



[Xo reaction with ferric chloride.] 



(17) CRYPTOPINE A., C.,,H,,NO, (T. and H. Smith) ; crystallizes in six- 

 sided prisms from alcohol ; M.P. 217^ (17("-177' with sublimate, Guy) ; 

 optically inactive; specific gravity l.'^.'jl ; bitter, then hot peppermint- 

 like taste ; alkiiline, hypnotic (also convulsant action upon dogs), and 

 mydriatic. Salts tend to gelatinize. 



Soluble in 1,2011 parts cold alcohol (better hot), and in chloroform: 

 slightly in water, giving jelly or crystals : scarcely in benzene: not in 

 ether unless freshly precipitated (and even then it is slowly re-deposited), 

 nor in preiroleum ether or turpentine. 

 Reactions : 



Alkaline hydrates, pp. insoluble. 

 The platinum chloride salt, soluble on warming. 

 Indo-potassic iodide, pp. 



The mercuric chloride salt, soluble on warming. 

 Colour tests : 



Concentrated sulphuric acid, intense blue. 



Nitre added to this solution, green~<.yellow ; on adding more alkaloid, 



intense green. 

 Nitric acid alone, gradually yellow. 



(18) LAUDANINE A., C„„H.3N04 (Hesse). Isomeric with Codamine (14) ; 

 crystallizes in radiatingprisms ; M.P. lljtj=, no sublimate; Isevo-rotatory ; 

 speciBc gravity 1'25."), alkaline, bitter, very poisonous. 



Soluble in hot alcohol (with difficulty cold), in G47 parts ether, in 

 benzene, and readily in chloroform. 



Removed from alkaline solution by chloroform readil}-. 

 Reactions : 



Alkaline hydrates, ])p. soluble in excess. 



Ferric chloride, an emerald-green coloration. 



