276  Some  Brands  of  Hydrogen  Peroxide,  {AmjJu°nue^^arm' 
The  analysis  was  continued  on  the  fifty  grams  of  fresh  drug,  and 
the  following  is  a  summary  of  the  results  obtained  : 
Per  Cent. 
Fat,   0-48 
Resin,    .  .   0*31 
Alcohol  extract,  containing  tannin,  crystalline  organic  acid, 
alkaloid  and  glucoside,   9*32 
Mucilage  and  sugars,   1*90 
Sodium  hydrate  extract,   0*25 
Hydrochloric  acid  extract,   014 
Lignin,   0*28 
Ash,   .  .  •  *   16*91 
Moisture,   yo8 
Cellulose  and  undetermined,   63*33 
IOO'OO 
A  COMPARISON   OF   SOME   MEDICINAL  BRANDS  OF 
HYDROGEN  PEROXIDE. 
By  R.  Louis  Lloyd,  A.B. 
Read  at  the  Pharmaceutical  Meeting  of  the  Philadelphia  College  of  Pharmacy,  May  16. 
The  brands  examined  were  Bene,  Peuchot,  Marchand  and  Oak- 
land Chemical  Company.  Each  was  claimed  to  be  chemically  pure 
and  of  fifteen  volumes  strength.  All  were  obtained  directly  from 
the  manufacturers,  and,  though  some  were  several  weeks  old, 
they  were  in  unbroken  packages  and  remained  sealed  until  the 
moment  of  the  estimation  of  oxygen.  Mr.  Peuchot  learned  that  the 
analysis  was  being  made  and  sent  a  special  sample  which  he  claimed 
would  be  an  improvement  on  his  former  productions.  This,  in  the 
table,  is  designated  as  Peuchot  No.  2. 
The  volume  of  oxygen  was  estimated  by  the  method  of  F.  X.  Moerk. 
A  solution  of  potassium  permanganate,  2-625  grams  to  the  litre  of 
water  was  prepared.  About  two  litres  of  water  was  acidified  with 
5  cubic  centimetres  of  dilute  sulphuric  acid,  and  exactly  5  cubic 
centimetres  of  the  hydrogen  peroxide  solution  added.  The  potas- 
sium permanganate  solution  was  then  poured  in  gradually  until  it 
ceased  to  be  decolorized,  and  the  number  of  cubic  centimetres 
added,  divided  by  10,  represents  the  volume  of  oxygen. 
In  the  results  for  volume,  that  sample  which  was  examined  again 
after  being  opened,  is  marked  with  the  small  letter  (a). 
The  acidity  was  reckoned  by  using  a  solution  of  ten  milligrams 
of  potassium  hydrate  in  one  cubic  centimetre  of  water,  with  phenol- 
