classification op reactions, etc. 

 Sulphuric Acid (27).] 

 27. CONCENTRATED SULPHURIC ACID produces colour changes 

 with an extremely large number of alkaloids, glucosides, and amaroids, 

 when a fragment of the substance is brought in contact with it ; in 

 many instances a succession of colours is given. 



I. Alkaloids giving red, purple, i [Papaverine, if impure bl.-v.-«^-v. ; 



and violet shades.* 

 [Aconitine, if impure r. or grad. v.] 

 Apomorphine, r. 

 Asiminine, gn.-wr.~\.colourless. 

 Atisine, y.~<-p. 

 Beta-homo-chelidoniue, v. 

 Boldine, r. 



[Brucine, r. if acid, not pure.] 

 Calcitrapine, see II. 

 Chelerythrine, y.-r. 

 Cinchonamine, r.-y. 

 [Cocaine, r. if not pure ; see IV.] 

 C'orydaline, y,-r. (?) ; see IV. 



„ (Adermann's), y.'^v. 



Cuprouine, r. (bl.-v. with water). 

 Curarine, r. or bl.~\.r. 

 Delphinoidine, r.-v. 

 Ditamine, r. 

 Ecboline, dark r. 

 Echitamine, p. 

 Echitenine, r.-v. 

 Eupatorine, r.-bn. 

 Fumarine, v. 

 Grandifloriue, y.~»'r. 

 Heliotropine, y.-v^r 

 [Hydrastine, r. if acid, not pure.] 

 Hypoquebrachine, v. 

 Laudanine, pink. 

 Laudanosine, r.-bn. 

 Laurotetanine, pale rose. 

 [Narceine, if impure blood-r. or 

 bl. ; see II.] 



see IV.] 

 Pareirine, v. 



Physostigmine, grad. r. ; see II., III. 

 Porphyrine, p. 



Protoveratridine, v.'>~cherry-r. 

 Eheadine, r, or III. 

 Rubijervine, r. 

 Sabadilline, r. 

 Sabadine, y.~vblood-r.~^.v. 

 Sabadinine, blood-r. 

 Sabatrine, grad. r. 

 Solanine, r.-y. 

 Staphisagrine, r.~vv., or IV. 

 Taxine, p.~vv. 

 Thebaine, blood-r. 

 Veratralbine, y.~^r. 

 Veratrine, y.~«-r. 

 Veratroidine, see II. 



la. Non-alkaloidal substances 

 giving red, purple, and violet 

 shades. 



Adonin, G., deep r. 



Angelin, B., r. 



Amygdalin, G., light v.-r. 



Assamic acid, G., y.-^/^r.•^~bl.-xvv. 



Brucamarin, v. 



Californin, B., bn.-r. 



Calumbin, r. 



Camellin, r. 



Cascarillin, B., blood-r. 



Cerberin, v. 



* It must not be overlooked that impure alkaloids frequently give colours, although 

 the pure substances do not. 



Cbamaelirin, B., ^.~^•black. 



Cnicin, B., r.-^v. 



[Convallamarin, v., acid to aqueous 



solution.] 

 Convolvulin, G., grad. r. 

 Copalchin, B., r. 

 Cj'clamin, G., r. 

 Digitouin, G., v. 

 Dulcamarin, B., r.-wrose. 

 Elateriu, B., dark r. 

 Frangulin, G., gn.~>-p.-wdark r. 

 Gratiosolin, bn.-r. 

 Helixin, G., bright r. 

 Helleborein, G., bn.-r. 

 Helleboretin, bn.-r. 

 Helleborin, G., blood-r. 

 Hesperidin, r. (intense on warming). 

 Hydrocarotin, r. 

 Jalapin, G., grad. r. 

 Kosin, B., r. 

 Laserpitin, B., r. 

 Limonin, G., blood-r. 

 Linin, B., dark v. 

 Mangostin, B., y.-r. 

 Melanthin, G., rose-^v.-r. 

 Menyanthin, G., y.-bu.'wv. 

 Ononiu, G., r.-y.-v^-r. 

 Panaquilon, p,-r. 

 Phillygenin, r. 

 Phillyrin, G., r.-v. 

 Phloretiu, r. 

 Phlurrhizin, G., y.-^vr. 

 Physodin, v. 

 Pimpinellin, B., r. 

 Podophyllotoxin, r.~^.gn.->A.bl.~vv. 

 Populin, G., r. 

 Quinovin, B., grad. r. 

 Rosaginin, G., r.-bn. 

 Salicin, G., r. 

 Saligenin, intense r.- 



103 

 [SuLPHCKic Acid (27). 

 Sapogenin, grad. v. 

 Saponin, <i., light r. 

 Sapotin, (J., r. 

 Scillin, r.-bn. 

 Scillitoxin, r.-wbn. 

 Smilacin, dark r., or II. 

 Sophorin, G., flesh-colour. 

 Sparattospermin, gn.-v^-r. 

 Tampicin, G., grad. r. 

 Theveresin, G.-d., as Thevetin. 

 Thevetin, G., r.-bn. ■wr.'wv. 

 Turpethin, G., grad. r. 

 Urechitin, I 

 Urechitoxin, I •'''^ -"^P- 

 Vernonin, G., bn.^«-p. 



II. Alkaloids giving yellow to 



brown colours : 

 Alpha-horao-chelidonine, y, 

 Amarylliue, r.-bn. ~v.bn. 

 Anthocercine, j'.-bn. 

 Atisine, see I. 

 Berberine, y. 



Calcitrapine, dark bn.A/vv.->/vgray-bn. 

 Calycanthine, pale y. 

 Ceanothine, r.-bn. 

 Chelerythrine, y.-r. 

 Cinchonamine, r.-y. 

 Colchiceine, ) 

 Colchicine, \ ^' 

 Conchairamidine, y.-^dark gn. 

 Conchairamine, bn.-vA-intense gn. 

 Corydaline (Adermann's), y.->~v. 

 Delpbinine, light bn., or IV. 

 Delphinoidine, r.-bn. 

 Emetine, dirty bn. to gn. 

 Gelsemine, y.-wr.-bn., or IV. 

 Gnoscopine, y. 

 Grandiflorine, y.-r. 

 Heliotropine, y.'^^r. 



