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MAUVE,  OR  ANILINE  PURPLE. 
it  decomposes,  yielding  a  basic  oil.  Its  analysis  has  led  to  the 
formula  C27*H24N4. 
Hydrochlorate  of  Mauveine  This  salt  is  prepared  by  the 
direct  combination  of  mauveine  with  hydrochloric  acid.  From 
its  boiling  alcoholic  solution  it  is  deposited  in  small  prisms, 
sometimes  arranged  in  tufts,  possessing  a  brilliant  green  me- 
tallic lustre. 
It  is  moderately  soluble  in  alcohol.  Carbon,  hydrogen,  ni- 
trogen, and  chlorine  determinations  have  led  to  the  formula 
C27H24N4HC1. 
I  have  endeavored  to  obtain  a  second  hydrochlorate,  but  up 
to  the  present  time  have  not  succeeded. 
Platinum  Salt. — Mauveine  forms  a  perfectly  definite  and 
beautifully  crystalline  compound  with  bichloride  of  platinum, 
which,  if  prepared  with  warm  solutions,  separates  in  the  form 
of  crystals  of  considerable  dimensions.  It  posseses  the  green 
metallic  lustre  of  the  hydrochlorate,  but,  on  being  dried,  as- 
sumes a  more  golden  color.  It  is  very  sparingly  soluble  in 
alcohol.  The  analysis  of  this  salt  has  led  to  the  following 
formula :— - 
C27H24N4,HPtCl3. 
Gold  Salt  This  substance  separates  as  a  crystalline  pre- 
cipitate, which,  when  moist,  presents  a  much  less  brilliant  as- 
pect than  the  platinum  derivative ;  it  is  also  more  soluble  in 
alcohol  than  that  salt,  and  when  re-crystallized  appears  to  lose 
a  small  quantity  of  gold.  Its  analysis  has  given  numbers 
agreeing  with  the  formula — 027H24N4,HAuCl4. 
Hydrobr -ornate  of  Mauveine. — This  salt  is  prepared  in  a  similar 
manner  to  the  hydrochlorate,  which  it  very  much  resembles, 
except  that  it  is  less  soluble.  Carbon,  hydrogen,  and  bromine 
determinations  give  results  agreeing  with  the  formula — 
C27H24N4HBr. 
Hydriodate  of  Mauveine. — In  preparing  this  salt  from  the 
base,  it  is  necessary  to  use  hydriodic  acid,  which  is  colorless, 
otherwise  the  iodine  will  slowly  act  upon  the  new  product.  It 
crystallizes  in  prisms,  having  a  green  metallic  lustre.  It  is  more 
*  C  =  12. 
