1872.] 



History of the Opium Alkaloids. 



281 



Dried at 100°, these crystals gave these numbers : — 



0-306 grm. gave 0719 C0 2 and 0-182 H 2 0. 

 0-3135 „ 0-742 „ 0-194 „ 

 0-229 „ 0-098 AgCl. 



Calculated, Found. 



C 72 864 64-38 64-08 64-54 



H 88 88 6-56 6-61 6-88 



N, 56 4-17 



12 192 14-30 



Cl~ 142 10-59 10-60 



C 7a H M N 4 la , 4HC1 1342 100-00 



Na 2 C0 3 throws down from the solution of the hydrochlorate white amor- 

 phous flakes that do not oxidize spontaneously in the air. Dried at 100°, 



0*2965 grm. gave 07765 C0 2 and 0-189 H 2 0. 



Calculated. 

 , A N Tound. 



C TO 864 72-24 71-43 



H 84 84 7-02 7-08 



N 4 56 4-68 



12 192 16-06 



G, 2 H 84 N 4 12 1196 100-00 



If the solution of the hydrochlorate he concentrated, the addition of 

 Na 2 C0 3 solution throws down tarry globules consisting of a mixture of the 

 base and its hydrochlorate, the salt being sparingly soluble in the NaCl 

 solution formed by the decomposition. 



Dicodeia and its salts do not yield a blood-red colour with N0 3 H, only 

 a slight orange tint; Fe 2 C1 G , also S0 4 H 2 -fK 2 Cr 2 7 , give no colour- 

 reactions. 



In general properties, and in the fact that the water of crystallization 

 possessed by the hydrochlorate is lost at 100°, dicodeia bears a great re- 

 semblance to the "isomer of codeia" obtained by Drs. Matthiessen and 

 Armstrong by the action of diluted sulphuric acid on codeia*. On com- 

 parison with the product obtained by Armstrong's process, no difference 

 whatever was discernible provided the hydrochlorate obtained by the action 

 of sulphuric acid &c. were several times recrystallized. The crude hydro- 

 chlorate contains, besides the dicodeia salt, the hydrochlorate of another 

 polymeride which differs from dicodeia hydrochlorate in that it is non- 

 crystalline, drying up to a gummy, extremely hygroscopic and deliquescent 

 substance ; it yields a blood-red colour with N0 3 II, and with S0 4 H 2 -f K 2 

 Cr 2 7 a very evanescent purplish red ; Fe 2 Cl 6 gives no coloration at first, 



* Cheui. §oc. Journ. [2] ix. 50. 



