MR. SCHUNCK ON RUBIAN AND ITS PRODUCTS OF DECOMPOSITION. 415 
II. 0'3910^1-m. gave r0150 carbonic acid and O' 1370 water. 
III. 0'4000grm. of a new preparation gave 1'0350 carbonic acid and O' 1435 water. 
In 100 parts it contained therefore — 
I. 
II. 
III. 
Carbon . . 
. . . . 70'78 
70-79 
70-56 
Hydrogen . 
.... 3-88 
3-89 
3-98 
Oxygen . . 
.... 25-34 
25-32 
25-46 
It is doubtful whether 
this body contains 44 or 
32 equivalents of carbon. 
formulae C 44 H 14 O 12 , C 32 Hio Og and C 32 Hu O 9 require 
lowing amounts of the three constituents : — 
in 100 parts 
respectively the 
C44 Ojj. c 
32^10 ^ 8 - 
C32 Hll Oy. 
Carbon . . 
.... 70-58 
72-18 
69-81 
Hydrogen . 
.... 3'74 
3'75 
4-00 
Oxygen . . 
.... 25-68 
24-07 
26-19 
If the first formula be adopted, then this substance is formed from chlororubian by 
the latter losing its chlorine, which combines with sodium and is replaced by oxygen, 
while 13 equivalents of water are eliminated, in accordance with the following 
equation : — 
C 10 ,,+Na 0 =C 44 H 44 0,,+NaCl+ 1 3HO. 
If one of the two latter forrnulse be adopted, then chlororubian first splits up into 
chlororubiadine and sugar, and the former then loses its chlorine which is replaced 
by oxygen, while either five or four equivalents of water separate, as will be seen 
from the following equations : — 
C 44 H 27 C1024d-NaO = C32 H,o Og-J-Cia H ,2 Oia-f-NaCI-j-SFIO, 
C 44 H 27 C1024+NaO=C32 O 9 +C 43 Bn 042+NaCl+4H0. 
The first formula agrees best with the results of analysis. Nevertheless, it seems 
improbable that chlororubian, when subjected to the action of so potent an agent as 
caustic soda, should not, in the first instance at least, be decomposed in the same 
manner as with strong acids. On the other hand, if this were the case, chlororubia- 
dine should, by the action of caustic alkalies, be converted into the same body as 
chlororubian, which is not the case. If chlororubiadine be treated with caustic soda 
in the same way as chlororubian, it first dissolves with a purple colour, but the solution 
on boiling slowly deposits reddish-brown flocks and loses the greatest part of its purple 
colour. The flocks, on being treated with boiling muriatic acid, acquire an orange 
colour, and after being collected on a filter and washed, are found to be almost inso- 
luble in boiling alcohol; but notwithstanding their resemblance to the body formed 
from chlororubian, they differ froin the latter in containing* a large quantity of 
chlorine, only a small quantity of the latter having been abstracted by the alkali. 
0'3610grm. of this substance, dried at 100 ° C., gave 0'8620 carbonic acid and 
O' 1060 water. 
0'2920grm. gave O'lllO chloride of silver. 
MDCCCLV. 3 K 
