82  A  New  Dye  Stuff.  {kKiS;m?*- 
and  the  residue,  left  after  a  carefully  conducted  evaporation,  weighed. 
The  fusion-point  of  arachidic  acid,  obtained  in  this  manner,  is  about 
71°  ;  of  the  pure  substance,  73°.  The  author  enters  further  into 
lengthy  details  as  to  the  method  of  estimating  the  minute  quantity  of 
the  arachidic  acid  dissolved  (and  therefore  not*  collected  along  with 
the  great  bulk)  in  the  strong  alcohol  used  in  these  operations ;  the 
process  is  such  that  it  may,  with  due  care,  yield  very  accurate  results. 
Arachis  oil  is  better  known  as  ground-nut  oil. — Qhem.  News,  from 
Comptes  Rendus.  Dec.  4,  1871. 
A  NEW  DYE-STUFF. 
By  J.  M.  Merrick,  S.  B. 
I  have  recently  had  given  to  me,  to  be  tested  in  comparison  with 
Persian  Berries  and  Flavine,  a  new  yellow  dye-stuff  which  possesses 
very  unusual  properties. 
It  occurs  in  the  form  of  a  brownish  yellow  powder,  wholly  organic 
in  its  nature,  neutral  and  not  very  soluble  in  water. 
A  given  weight  of  it  communicates  to  mordanted  print  cloths  a  rich 
persistent  orange  color,  (or  yellow  if  lesser  amount  be  used),  and  is 
equal  in  this  respect  to  three  and  one-half  times  its  weight  in  Fla- 
vine, or  four  and  one-half  times  its  weight  of  the  best  Persian  Ber- 
ries. The  process  of  manufacturing  this  coloring  matter  is — it  is  un- 
derstood— kept  a  secret,  but  it  is  certain  that  it  is  not  an  Aniline 
product.  It  is  sold  under  the  name  of  Aurantine,  and  if  any  reader 
of  the  Chemist  can  give  me  any  information  as  to  its  origin  or  manu- 
facture I  shall  be  much  indebted  to  him. 
I  find  that  by  diffusing  a  small  amount  of  this  dye-stuff  in  water  at 
180°  F.  and  working  the  mordanted  cloth  in  this  bath,  a  rich  full 
Flavine  yellow  is  produced.  On  raising  the  temperature  the  yellow 
rapidly  changes  to  a  fine  orange,  which  seems  durable  and  persistent. 
After  satisfying  myself  of  its  worth  I  had  some  tested  by  a  large 
Print  Works,  and  their  estimate  of  its  value  agreed  very  nearly  with 
mine.  It  is  an  interesting  product  and  seems  by  its  color  to  merit 
its  name — Aurantine. — Amer.  Chem.,  1872,  Jan.,  253. 
