3o6  Creasote  and  Carbolic  Acid.  {^j&ST^ 
pletely  between  200-226°C;  further,  guaiacol  and  creasol  which  were 
produced  from  the  potassium  compound  of  creasol,  purified  by 
repeated  crystallization  from  alcohol  and  ether,  and  then  obtained  by 
fractional  distillation.  The  creasote  and  carbolic  acid  were  dissolved  in 
hot  water,  allowed  to  cool  and  then  filtered. 
A.     The  aqueous  solution  of: 
To  ij  cc.    of  test  -  fluid 
added  one  drop  of : 
! 
BeecJvwood  tar  Creasote         Carbolic  Acid. 
1 
Morson' s  Creasote. 
Ferric  chloride  (cryst.)  dis- 
solved in  10  pts.  of  water 
First  blue,  then  brown; 
after  standing,  orange 
Violet,  lasting 
First    blue,   then  olive- 
green,  at  last  dirty  yel- 
low 
On  further  addition 
Dark-brown  precipitate 
Violet,  lasting 
Light-brown  precipitate 
Ferric    acetate     dry,  dis- 
solved in  10  pts.  of  water 
Brown,  afterwards  turn- 
ing somewhat  to  violet, 
and  at  last  brown  pre- 
cipitate 
Brown  and  clear  solution 
Same  as  carbolic  acid 
Ferrous  sulphate,  dry,  dis- 
solved in  20  pts.  of  water 
Blue,  then  acquiring  a  vi- 
olet tint,  and   at  last 
brown  precipitate 
Violet,    lasting,  without 
precipitate 
On  dropping   in,  grass- 
green  ;  then  yellow  pre- 
cipitate 
ILead  nitrate,  dissolved  in 
10  pts.  of  water 
Clear,  without  effect 
Turbidness  ;  after  stand- 
ing, a  little  precipitate 
Same  as  carbolic  acid 
Stannous  chloride. dissolved 
10  parts  of  water 
White   precipitate,  solu- 
ble in  excess  of  stan- 
nous chloride 
Slight  precipitate;  insol- 
uble in  excess 
Same  as  carbolic  acid 
Neutral  acetate  of  lead,  dis- 
solved in  10  pts.  of  water 
White  precipitate,  solu- 
ble in  excess 
Slight  precipitate;  solu- 
uble  in  excess 
White  precipitate  ;  only 
partially  soluble  in  ex- 
cess 
B.  1  part  Creasote,  or  Carbolic  Acid,  in  10  parts  of  Alcohol  (92  per  cent.,  Tralles). 
Aqueous  solution  of  ferric 
chloride  with  one  drop  : 
On   dropping   in,  blue; 
then  green 
On  dropping  in,  violet; 
then  green 
On  dropping  in,  green  ; 
then  beautiful  cerulean 
blue 
C.  Creasote  and  Carbolic  Acid,  unmixed. 
With    saturated  alcoholic 
solution  of  ferric  chloride 
adding  1  drop  : 
On  the   addition  of  more 
drops  : 
Dirty  violet 
On  dropping  in,  yellow- 
ish-green ;  then  brown 
On  dropping  in,  green  ; 
then  turbid  light-brown 
Immediately  green 
Immediately  green 
Immediately  green 
Chemically  pure  guaiacol  and  creasol  behaved  with  the  above 
reagents  like  beechwood  tar  creasote. 
Further  was  tried  the  behavior  of  glycerin  towards  creasote,  in  the 
hope  of  finding  a  reagent  bv  the  aid  of  which  the  amount  of  carbolic 
acid  in  adulterated  creasote  could  be  determined.  The  result  confirmed 
Read's  observation  ("Am.  Jour.  Phar.,"  1874,  p.  292)  that  Morson's 
