Am.  Jour.  Pharm.  1 
August,  1900.  / 
White  Wax. 
373 
were  each  heated  with  20  c.c.  alcohol,  95  psr  cent.,  and,  when  melted, 
thoroughly  shaken.  One  cubic  centimetre  phenolphtalein  solution 
was  then  added  and  the  mixture  titrated  with  an  alcoholic  potassium 
hydrate  solution  containing  30  grammes  pure  KOH  in  1,000  c.c. 
alcohol,  95  per  cent.    There  were  required  for 
No.  1   2  85  c.c. 
No.  2  2*9  " 
No.  3  2*6  " 
to  bring  to  a  faint  pink,  20  c.c.  more  of  the  alcoholic  potassium 
hydrate  solution  were  added  and  the  whole  heated  on  a  water-bath 
for  fifteen  minutes.  The  solution  was  then  titrated  back  with  one- 
half  normal  sulphuric  acid,  requiring  for 
No.  1  6*9  c.c. 
No.  2  7-45  " 
To  determine  the  titer  of  the  alcoholic  potassium  hydrate  solu- 
tion, 25  c.c.  were  heated  on  a  water-bath  for  fifteen  minutes,  phenol- 
phtalein added  and  then  titrated  with  one-half  normal  sulphuric 
acid,  requiring  20  c.c,  showing  the  presence  of  22-396  milligrammes 
KOH  in  1  c.c.  of  the  alcoholic  solution.  The  above  results  obtained 
with  sulphuric  acid  expressed  in  quantities  of  alcoholic  potassium 
hydrate  solution  are  for 
No.  1  •  8*625  c-c- 
No.  2  9'3X25  u 
No.  3  f  10*8125  " 
leaving  for  the  combined  KOH, 
No.  1  i4'225  c.c. 
Now,  calculating  from  these  data  the  number  of  milligrammes 
potassium  hydrate  required  to  neutralize  the  free  acid  in  1  gramme 
of  wax,  we  obtain  the  so-called  "  acid  numbers,"  as  follows : 
No.  3 
8*65 
No.  2 
No.  3 
I3'5875 
1 1 7875 
No.  1 
No.  2 
No.  3 
19*209 
1 9 '503 
18*309 
The  "saponification  numbers"  represent  the  number  of  milli- 
grammes of  potassium  hydrate  required  to  saponify  I  gramme  of 
wax,  and  are  as  follows  : 
