Am.  Jour.  Pharm. 
Aug.,  1891. 
Comparison  of  Acetic  Ethers. 
397 
water  at  i6°  C.  It  is  clearly  miscible  in  any  proportion  with  chlo- 
roform, ether,  petroleum  ether  (400  C),  benzol,  benzin,  fixed  and 
volatile  oils,  liquid  petrolin,  and  glacial  acetic  acid  ;  also  soluble  in 
2x/2  times  its  volume  of  bisulphide  of  carbon,  but  only  very  slightly 
soluble  in  glycerin.  It  dissolves  iodine  and  bromine  freely,  sulphur 
and  phosphorus  with  difficulty.  Quinine,  cinchonine,  strychnine, 
tannin,  pyroxylin  and  resins  are  also  freely  soluble  in  absolute  acetic 
ether.    Alkalies  decomposed  it  into  acetic  acid  and  alcohol. 
Table  Showing  Comparison  of  Some  Commercial  Acetic  Ethers. 
1 
2 
3 
4 
5 
6 
7 
8 
Rcsictiou 
HClltfcll 
strongly 
acid 
Sp.  g.  at  15-5°  C,  .  .  . 
•8893 
•886 
•878 
•877 
•875 
•857 
•877 
•886 
72°  C. 
70°  C 
7i'5°  C. 
72°  C. 
72-5°  C. 
75°  C. 
74°  C. 
75°  C. 
H2S04  1-82,  
colorless 
colorless 
colorless 
colorless 
colorless 
colorless 
colorless 
pinkish 
Residue  on  evapora- 
Test  Sol.  AgN03,    .  . 
Test  Sol.  BaClo,    .  .  . 
slightly 
turbid 
very 
turbid 
Solubility  in  Benzol,  . 
clear 
clear 
cloudy 
cloudy 
cloudy 
cloudy 
very 
cloudy 
very 
cloudy 
Solubility  in  CS2., 
equal  volume,  .  .  . 
clear 
clear 
cloudy 
cloudy 
cloudy 
cloudy 
very 
cloudy 
very 
cloudy 
Odor  on  saponifying 
and  super  saturat- 
ing with  dil.  H2S04, 
no  odor 
no  odor 
butyric 
odor 
slightly 
empy- 
reumatic 
no  odor 
no  odor 
butyric 
odor 
empy- 
reumatic 
odor 
if,  Sol.K2Mn208,   .  .  . 
color 
destroyed 
1 
color 
destroyed 
Number  1  is  the  absolute  acetic  ether  made  by  the  sodium  ethyl- 
ate  process,  for  comparison ;  No.  2  is  of  German  origin,  marked 
"  absolute  C.  P.;"  the  remainder  are  domestic  specimens  obtained 
from  various  sources. 
The  reaction  of  the  different  ethers  was  determined  in  the  follow- 
ing manner;  to  about  7  cc.  of  distilled  water  in  a  test  tube,  5  drops 
