218 
Preparation  of  Pure  Chlorophyll. 
f  Am.  Jour.  Pharm. 
(       April,  18i>4. 
Pare  chlorophyll  prepared  as  above  forms  blackish-green  drops, 
which  have  not  yet  been  made  to  crystallize.  It  dissolves  with  great 
facility  in  alcohol,  ether  and  benzene,  easily  also  in  oils  both  fatty  and 
volatile,  sparingly  in  fused  paraffin,  not  at  all  in  water.  It  is  con- 
verted by  dilate  acids  into  yellow  chlorophyllan,  by  strong  hydro- 
chloric acid  into  blue  phyllocyanin,  and  is  resolved  by  potash  lye  into 
an  emerald-green  substance  which  dissolves  readily  in  water,  forming 
an  emerald-green  strongly  fluorescing  liquid,  externally  very  much 
like  chlorophyll  solutions,  and  a  yellow  body  which  may  be  extracted 
by  ether  from  the  aqueous  solution.  The  alcoholic  solution  of  pure 
chlorophyll  is  much  less  sensitive  to  light  than  ordinary  tincture  of  chlo- 
rophyll. I  regard  this  pure  chlorophyll  as  identical  with  the  chloro- 
phyll of  living  plants,  and  reserve  to  myself  the  right  of  examining 
it  further. 
The  following  is  a  contribution  to  the  synonymy  of  certain  bodies 
of  the  chlorophyll  group : 
Chlorophyll  (Pelletier  and  Handbooks)  =  crude  chlorophyll  (Wiesner). 
— Cyanophyll  +  Xanthophyll  (G.  Eraus). 
Cyanophyll  (G.  Kraus)  =  chlorophyll  (Wieener). — Blue  chlorophyll 
(Sorby). — Pure  chlorophyll  (Tschirch)  +  some  a-Xanthophyll. 
Chlorophyllan  (Hoppe-Seyler)  =  Modified  chlorophyll  (Stokes).— Acid 
chlorophyll  of  the  Handbooks. — Acidoxanthin  (C.  Kraus). — Filhol's  preci- 
pitate (obtained  on  adding  organic  acids  to  chlorophyll  tincture).  — Crystal- 
lized chlorophyll  (Gautier  and  Rogalski). — Pure  chlorophyll  (Jaudin). — 
Yellow  chlorophyll  (Sorby). — a-Hypochlorin  (Pringsheim's  hypochlorin). 
— (?)  Borodin's  chlorophyll  crystals. — Coloring  matter  which  produces  the 
winter  fading  of  certain  evergreen  plants  (Haberlandt,  G.  Kraus,  Aske- 
nasy). — Coloring  matter  which  produces  the  discoloration  of  strongly  acid 
leaves  in  the  dark. 
Phylloxanthin  (Fr6my?)  (Tschirch)  =  xanthophyll  (Berzelius)  ex  part. 
— ?  Chlorophyllic  acid  (Liebermann).— Xanthin  (C.  Kraus). 
PhyHoxanthei'n  (Weiss)  =  alkali  phyllocyanate  (Tschirch). — Freniy's 
■etiolin. 
Phyllocyanic  acid  (Fremy,  ex  part)  =  pure  chlorophyll  (Berzelius,  Mul- 
der, Pfaundler,  Harting). 
B©dy  precipitated  by  water  from  solution  of  phyllocyanin  (Tschirch). — 
(?)  Chlorophyllanic  acid  (Hoppe-Seyler). 
Potassium  chlorophyllinate  (Tschirch)  =  Chlorinkali  (C.  Kraus1. — 
Sachsse's  precipitate  formed  by  potassium  or  sodium  in  solution  of  cyano- 
phyll. 
a-Xanthophyll1  =  xanthophyll  (G.  Kraus). 
JTbe  xanthophylls  here  enumerated  are  perhaps  identical;  but  till  the  point  is 
definitely  established,  they  may  be  conveniently  distinguished  by  Greek  letters. 
