202 DR T. ANDERSON ON SOME OF THE 
corresponding with the formula 
Cy H,, Br NO, + HBr. 
Hydrochlorate of Bromopapacerine —is soluble in water, though sparingly. 
The rest of its salts have not been examined. 
Action of Chlorine on Papaverine. 
When a current of chlorine is passed through a solution of hydrochlorate of 
papaverine, the fluid becomes brown, and after a time a dirty gray precipitate 
makes its appearance, which is insoluble, or nearly so, in water, but dissolves in 
boiling alcohol, and gives a resinous deposit as the solution cools. When treated 
with ammonia, hydrochloric acid is separated, and a powder is obtained which 
is obviously chlorine base. Jt dissolves in the acids, and is reprecipitated by am- 
monia. Alcohol takes it up, and deposits it in an amorphous form on cooling or 
by spontaneous evaporation. The properties of this substance proving unsatis- 
factory, I then tried the action of chlorate of potass added in small successive 
portions to a solution of papaverine in excess of hydrochloric acid, but the same 
amorphous gray powder being produced, I did not pursue the subject further; 
for although one or more derivative bases are unquestionably produced, their 
properties are not sufficiently well marked to admit of their proper purification. 
Action of Iodine on Papaverine. 
When an alcoholic solution of papaverine is mixed with tincture of iodine, and 
the solution is left to itself for some hours, small crystals are slowly deposited, 
and by further evaporation of the fluid from which they have been removed, ano- 
ther substance is obtained. 
Teriodide of Papaverine.—To the crystals first separated I give this name. 
They are purified by solution in boiling alcohol, from which they are slowly de- 
posited in small rectangular prisms. Their colour is purple by reflected, and dark 
red by transmitted light. They are insoluble in water, but soluble in alcohol. 
It is not acted upon by dilute acids, but ammonia and potash rapidly decompose 
it, removing iodine, and leaving papaverine. From this fact it is clear that it is 
not the salt of a substitution base, but corresponds in constitution with the 
teriodide of codeine, which I described in a former paper.* Analysis gave the 
subjoined results :— 
8-550 ... carbonic acid, and 
7-065 grains teriodide of papaverine, dried at 212°, gave 
2:045 ... water. 
7-650 grains teriodide of papaverine gave 
7-489 ... iodide of silver. 
* Edinburgh New Philosophical Journal, vol. 1., p. 103. 
