Am.  Jour.  Pharm. 
January,  1906. 
Inorganic  Chemicals  of  the  U.S. P. 
15 
special  modifications  of  the  official  test  should  be  described  under 
the  official  salt,  where  such  change  is  necessary. 
In  the  same  way,  it  seems  that  all  tests  for  the  most  important 
impurities  could  be  summed  up  in  the  appendix,  as  are  now  those 
for  heavy  metals  and  for  arsenic,  thus  requiring  under  each  chemical 
discussed  bare  mention  of  the  impurities  likely  to  be  present  and 
reference  to  the  article  where  the  test  is  discussed  in  detail. 
QUALITATIVE  TESTS. 
The  pharmacopceial  requirements  for  the  following  chemicals  have 
been  reduced  by  the  omission  of  those  tests  for  impurities  (stated  in 
U.S. P.  1890),  given  below: 
CHEMICALS. 
Prepared  chalk. 
Potassium  bitartrate. 
"  carbonate. 
"    and  sodium  tartrate. 
"  ferrocyanide. 
"  hydroxide. 
"  hypophosphite. 
"  iodide. 
"  nitrate. 
"  sulphates. 
Sodium  acetate. 
"  benzoate. 
"  bicarbonate. 
"  bisulphite. 
"  borate. 
"  bromide. 
' '  chloride. 
"  hydroxide. 
"  hypophosphite. 
"  iodide. 
"  nitrate. 
"  phosphate. 
"  pyrophosphate. 
The  reduction  in  qu 
view  of  the  quality  of 
IMPURITIES  OMITTED. 
Magnesium,  iron,  barium  and  sulphates. 
Calcium,  chlorides  and  sulphates. 
Thio-sulphates,  sulphates,  chlorides,  cyanides 
and  sulphides. 
Sulphates  and  chlorides. 
Calcium,  soda,  sulphates,  chlorides,  silicates 
and  nitrates. 
Calcium,  chlorides,  sulphates  and  phosphates. 
Iron  and  sulphates. 
Calcium,  sulphates  and  chlorides. 
"       magnesium  and  " 
"       sulphates       "  " 
Potassium,     "  "  " 
calcium,  sulphates,  chlorides,  sul- 
phites and  thiosulphates. 
Sulphates  and  chlorides. 
Calcium,  sulphates  and  chlorides. 
potassium,  sulphates  and  moisture. 
magnesium  and  sulphates. 
"        chlorides,  sulphates  and  nitrates. 
potassium,  chlorides,  sulphates  and 
phosphates. 
Calcium,  sulphates  and  moisture. 
Potassium,  calcium,  magnesium,  sulphates  and 
chlorides. 
Potassium,  hypophosphites,  chlorides  and  sul- 
phates. 
Potassium,  chlorides  and  sulphates. 
ality  just  cited  is  a  part  of  the  more  rational 
chemicals  which  inspired  the  introduction  of 
