Am.  Jour.  Pharm.  \ 
October,  1906.  f 
Acetone  Collodions. 
471 
The  use  of  acetone  in  certain  lacquers  suggested  its  application 
to  the  preparation  of  collodions.  Several  of  the  so-called  "  liquid 
court  plasters  "  now  on  the  market  contain  this  as  a  main  ingredient. 
The  intent  of  this  paper  is  to  publish  formulas  that  appear  to  be 
satisfactory,  without  going  into  the  details  of  a  greater  number  of 
experiments.  Suffice  it  to  state  that  the  simplest  formulas  have 
yielded  the  best  results. 
ACETONE  COLLODION. 
Take  of— 
Pyroxylin   5  grammes. 
Camphor                                                   ....  1  gramme. 
Acetone,  a  sufficient  quantity  to  make   100  cc. 
Dissolve  the  pyroxylin  and  camphor  in  a  clean  bottle  with  90  cc. 
of  acetone  and,  after  solution  has  been  effected,  add  sufficient  of 
the  acetone  to  make  the  product  measure  100  cc.  If  the  pyroxylin  is 
of  a  good  quality  the  solution  will  be  prompt  and  perfect,  otherwise 
it  will  be  necessary  to  permit  the  liquid  to  stand  until  it  has  become 
clear  and  then  decant. 
Acetone  collodion,  as  thus  made,  evaporates  a  little  more  slowly 
than  the  official  alcohol-ether  collodion,  but  it  yields  a  much  stronger 
film,  which  is  transparent,  adheres  closely  to  the  surface  and  is  flex- 
ible without  the  addition  of  other  materials.  In  the  writer's  opinion 
this  preparation  possesses  advantages  over  both  the  official  collo- 
dion and  flexible  collodion,  and  should  displace  both  officially,  and 
render  the  latter  title  unnecessary.  Acetone  collodion,  likewise, 
makes  an  elegant  basic  preparation  for  the  application  of  the  aro- 
matic phenols,  iodine,  iodoform,  etc,  and  a  number  of  such  medi- 
cated collodions  are  readily  prepared  and  are  very  satisfactory. 
ACETONE  CANTHARIDAI,  COU,ODION. 
Take  of— 
Cantharides  in  No.  60  powder  60  grammes. 
Pyroxylin  4  grammes. 
Camphor  ,  .    1  gramme. 
Acetone,  a  sufficient  quantity. 
Moisten  the  cantharides  with  35  cc  of  acetone,  and  pack  in  a 
cylindrical  percolator.  Close  and  cover  the  percolator  and  macerate 
for  24  hours,  then  percolate  slowly  with  sufficient  acetone  until 
exhausted.  Reserve  the  first  80  cc  of  percolate  and  evaporate  the 
remainder  at  a  low  temperature  (550 — 6o°  C.)  to  a  soft  extract. 
