281 
needles. These were filtered off washed with ether and then recry- 
stallized in the following manner. They were dissolved in boiling 
aleohol and the solution obtained mixed with some ether saturated 
with hydrochlorie acid and finally pure ether added. Under these eun- 
ditions the erystallisation takes place rapidly and the produet obtai- 
ned shows a constant melting point of 2339 and is, as analysis 
have shown, the hydrochloride of haemopyrroline- disazo-dibenzene. 
Haemopyrroline-disazo-dibenzene hydrochloride erystallises in 
brown well developed pointed plates, resembling haemin; the ery- 
stals show faint metalie lustre, like nearly all azodyes. It dissolves 
in boiling alcohol eomparatively easily with a violet-red colour, 
closely resembling the colour of permanganate solutions; in ether, 
benzene, chloroform it dissolves sparingly. Warm acetie acid dis- 
solves it easily with a colour which appears more bluish than 
the aleoholie solution. The solution in cone. sulpurie acid appears 
at first bluish-violet but after some time it turns redder, and re- 
sembles at this stage aleoholie solutions. 
We analyzed 6 different samples with the following results: 
1) a, 01224 g. gave 0:0789 g. H,O; 02908 g. CO, 
DAAD 03T 208008, 
ZI OUR => 70000 020066 14 » 
D.:0:11027, 1,7 18:0.cm® N, t—15, p— 738 
Sy Det 10277 10 8, 12, p— 740 
4) a, 01417 „ „ 00879 g. H,0; 0:3414 g. CO, 
DUO 21.1700 N, t—=13, p— 740 
5) a, 01083 „ 17.Duome N 5 —16, np 746 
bene 0.0723 g. H,0; 02650 g. CO, 
6) a, 0.1925 „ 0.0688 g. AgCl 
b, 01504 , 216 eme N, t=17, p— 742 
e, 01027 „ „ 00659 g. H,0; 02453 g. CO, 
a br" b a a b a DORA b e 
C |64-79 6486, 6571 | 65:70 | 65-64 6494 
| | | | 
H | en 662. 6:89 | 689 | | 7:29 | 722 
| 18:20 18:16 | 
18:74 18-49) 18:76 
; | 
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