, 
; 

ITS PRODUCTS OF DECOMPOSITION. 65 

Experiment. Calculation. 
—————  ———————d 
Carbon, - : : ; 59°40 59:66 Cr 216 
Hydrogen, .- é : 6:54 6:07 H,, 22 
Nitrogen, : - - Hoe 773 N, 28 
Oxygen, ; 5 ; bot 26°54 0,. 96 
100-00 362 
Phosphate of Codeine.—Several phosphates of codeine appear to exist, but I 
have only examined that which is obtained by saturating tribasic phosphoric acid 
with codeine in powder. In this way a fluid is obtained, which, when concen- 
trated to a small bulk, refuses to crystallise, but from which crystals are imme- 
diately precipitated by the addition of strong spirit. The salt is thus obtained in 
small scales, or in short thick prisms. It is readily soluble in water, and cannot 
be obtained in crystals from the solution. Its analysis gave the following results, 
corresponding with the formula C,, H,, NO, HO 2 HO PO,. 
6°348 grains phosphate of codeine, dried at 212°, gave 
12:618 ... of carbonic acid, 
3°708 ... of water. 
Experiment. Calculation. 
e_—_—_<————. 
Carbon, . : ‘ F 54:25 54:27 Cy, 216 
Hydrogen, : 2 5 6:49 6:03 H,, 24 
Nitrogen, : ; : ates 3°52 N 14 
Oxygen, p 5 ee 18-09 0, 72 
Phosphoric acid, . ¢ ban 18-09 PO, 72 

100-00 398 
6-911 grains of the crystallised salt lost, at 212°, 0-434 grains of water=6:27 
percent. Three equivalents of water correspond to 6:35 per cent. ; and the formula 
of the crystallised salt is, consequently, C,,H,, NO, HO 2HOPO+3 HO. 
Oxalate of Codeine.—This salt is deposited, on cooling its saturated hot so- 
lution, in short prisms, and sometimes in scales. It requires 30 times its weight 
of water at 60° for solution, and about half its weight at 212°. Heated to 212° 
it loses water of crystallisation ; at 250° it becomes brown, and at a pocineae tem- 
perature it is entirely decomposed. 

6-073 grains oxalate of codeine, dried at 212°, gave 
14-7389 ... of carbonic acid, 
3608 --- of water. 
Experiment. Calculation. 
RN 
Carbon, . P : ; 66:19 66:28 Cs 228 
‘Hydrogen, 5 é 6:60 6:39 H,, 22 
Nitrogen, ; ? ; Mids 4:07 N 14 
Oxygen, ; - 3 vas 23°26 0, 80 
100-00 344 
VOL. XX. PART I. § 
