MAUVE,  OR  ANILINE  PURPLE. 
1T1 
passing  chlorine  gas  over  pieces  of  zinc  blende,  arsenical  pyrites, 
and  sulphur  pyrites,  we  only  obtained  indium  from  the  blende. 
Chloride  of  indium  sublimed  in  the  tube,  but  some  remained 
behind  with  the  chloride  of  zinc. 
We  have  found  indium  in  zinc  distilled  from  Friburg  ore,  and 
have  separated  the  oxide.  A  very  large  quantity  of  ammonia 
is  requisite  to  obtain  0*1  per  cent,  of  the  oxide  from  the  dis- 
solved zinc,  and  this  small  quantity  must  be  purified  in  the 
manner  before  described. — Chem.  News,  London,  Dec,  12, 1863. 
from  Journal  fur  Praht.  Chemie. 
ON  MAUVE,  OR  ANILINE  PURPLE. 
By  W.  H.  Perkins,  F.  C.  S* 
The  discovery  of  this  coloring  matter  in  1856,  and  its  intro- 
duction as  a  commercial  article,  have  originated  that  remarka- 
ble series  of  compounds  known  as  coal-tar  colors,  which  have 
now  become  so  numerous,  and,  in  consequence  of  their  adapta- 
bility to  the  arts  and  manufactures,  are  of  such  great  and  in- 
creasing importance.  The  chemistry  of  mauve  may  appear  to 
have  been  rather  neglected,  its  composition  not  having  been 
established,  although  it  has  formed  the  subject  of  several  papers 
by  Continental  chemists.  Its  chemical  nature  also  has  not  been 
generally  understood,  and  it  is  to  this  fact  that  many  of  the 
discrepancies  between  the  results  of  the  different  experimental- 
ists who  have  worked  on  this  subject  are  to  be  attributed. 
On  adding  a  solution  of  hydrate  of  potassium  to  a  boiling 
solution  of  commercial  crystallised  mauve,  it  immediately  changes 
in  color  from  purple  to  a  blue  violet,  and,  on  standing,  deposits 
a  crystalline  body,  which,  after  being  washed  with  alcohol  and 
then  with  water,  presents  itself  as  a  nearly  black  glistening 
body,  not  unlike  pulverized  specular  iron  ore. 
This  substance  is  a  base  which  I  propose  to  call  mauveine  ;  it 
dissolves  in  alcohol,  forming  a  violet  solution,  which  immediately 
assumes  a  purple  color  on  the  addition  of  acids.  It  is  insoluble, 
or  nearly  so,  in  ether  and  benzol.  It  is  also  a  very  stable  body, 
and  decomposes  ammoniacal  salts  readily.    When  heated  strongly 
*  From  the  Proceedings  of  the  Royal  Society. 
