DKTIONARV OK THE ACTIVE I-Rl.NCI l'I.K.S OF 1"1.ANT.<. 



[Potass, bichromate, scarcely a cloud at 1 in loO; see also mercuric 



chloride below.] 

 [Not T) per cent, chromic acid.] 



Phospho-molybdic acid, pp.; cloud at 1 iu .'i,(i(lo ; see colour tests below. 

 [Phospho-tungstic acid, cloud at 1 in ],(H)U.J 

 [ ,, antimonic acid, not at 1 in 1,000.] 

 lodo-potassic iodide, red ; 1 in ri.OOO. 

 Bromo-potassic bromide, red ; 1 in ;'),000. 

 Bismuth-potassic iodide, pp. ; slight at 1 in .'i.lKIU. 

 (Jadraium-potassic iodide, crys. needles ; 1 in 1,000 after '2 hours. 

 [Not zinc-potassic iodide.] 



Merouric-potassic iodide, amorphous 1 in 1,0(10 ; limit 1 in 2,ri00. 

 „ chloride, white crystalline 1 in MM); remains white with 



potass, bichromate (compare Strychnine). 

 Colour tests : 



Concentrated sulphuric acid, colourless, becoming gradually red ; 



violet on warming. 

 Concentrated sulphuric acid, heated with the alkaloid to 150 , converts 



to Suli)ho-morphine, with which ammonia gives white pp., and 



chloroform a red solution. Compare Codeine and Pseudo- 

 morphine. 

 Concentrated sulphuric acid with potassium chlorate, bluish- violet. 



„ „ „ warmed gently, then potass, perchloride, 



brown. Strychnine does not interfere. 

 Concentrated sulphuric acid with sugar, red (perceptible with ,/,„ 



milligramme ). 

 Concentrated sulphuric acid with the phospho-molybdic pp., bine ; 



dark brown on warming. 

 The phospho-molybdic pp. with potash, brownish-orange. 

 Concentrated sulphuric acid with nitric acid, violet. 

 Nitric acid added after 10 hours' solution in sulphuric acid (Dragen- 



dorff ), reddish->~bluish-violet-vv.blood-red~v.orange. 

 Nitric acid alone, orange~^'light yellow, 

 Hydrochloric acid (concentrated), no effect. 

 Dilute acids, dissolve readily. 

 Per-iodic acid, iodine liberated. 

 Fn'ihde's reagent, magnificent violet •»~ green ^,~ brownish-green -va. 



yellow ; after 2-1 hours, blui.sh- violet. 

 C-'-O APOMOHPHINE \., C„H„NO.,=Morphine less H.,0 ; formed by 

 L-ating the latter alkaloid in a sealed tube to 140° or IfiO" C. with zinc 



chloride or large excess of hydrochloric acid ; greenish crystals, alkaline 



reaction, emetic. The solutions become green on keeping. 



Soluble in alcohol, ether (purple colour), chloroform (violet), benzene ; 



with difficulty in water. 



On shaking an alkaline aqueous solution with petroleum ether, benzene. 



or chloroform, a red deei>mpi>sition product is removed. 



Precipitants : 



Alkaline hydrates, greenish-white or turning green ; sol. in excess. 



Ammonia (sol. excessj, dirty violet. 



Lime-water (sol. excess). 



Alkaline bicarbonate, white when pure, but turns green. 



[Not lead acetate.] 



Tannic acid, yellowish-green. 



Picric acid, yellow ; sol. warm. 



Ferric chloride, red, becoming black. 



Platinum chloride, yellow. 



Gold chloride, purple. 



Potassium ferrocyanide, reddi.sh-yellow : green on warming. 



„ ferricyanide, white, changing to violet, then black. 



„ sulphocyanide, white ; sol. warm. 



„ bichromate, orange. 



[Not ii per cent, chromic acid.] 



lodo-potassic iodide, blood-red ; sol. warm. 



Potassic iodide alone, white, changing to green. 



Bismuth jiotass. iodide, limit 1 in 111,000. 



Mercuric chloride, white. 



Zinc chloride ) ,-, , , , 



4 , > white, soluble on warming. 

 „ acetate J ' ° 



Colour tests (besides those formed by reagents above) : 



Concentrated sulphuric acid, red. 



Concentrated nitric acid, violet red. 



Per-iodic acid, reduced. 



Friihde's solution, violet. 

 (2/0 PSEUDOMORPHINE A. (of Pelletier : Donath's Dehydro-morphine ; 

 Schiitzenberger's Oxymorphine ; Polstorff'sO.'cydimorphine) ; C,-HnNO:, 

 or C:iiH;„5N.j6,; (t >. Hesse). Uccurs naturally in opium, though rarely, and 

 obtained from morphine by moderate oxidation, as with potassium ferri- 

 cyanide. Its occasional presence in opium extracts may arise also from 

 oxidation. 



