Am.  Jour.  Pharm. 
Jan.,  1893. 
Sandal-wood  and  Cedar  Oils. 
23 
oil  is  rather  greater  than  for  sandal-wood  oil,  but  the  difference  is 
not  sufficiently  uniform  to  permit  of  its  use  as  a  means  of  detecting 
substitution  or  adulteration  with  the  former. 
(6)  Color  Tests. — Of  the  color  reactions  the  most  important  are 
those  with  nitric  acid,  and  hydrochloric  acid  and  chloroform,  the 
former  giving  a  green  tint  with  cedar  oil  and  the  latter  a  pink 
coloration  in  the  acid  layer,  which  are  not  produced  by  the  different 
kinds  of  sandal-wood  oil. 
Detection  of  Adulterants. — With  a  view  to  detect  the  presence  of 
cedar  oil  and  also  of  castor  oil  in  sandal-wood  oil  the  following  trials 
of  the  spirit  test  were  made : 
Sandal- wood  oil  No.  1  with  12  per  cent,  of  cedar-wood  oil  No.  12 
showed  no  appreciable  difference  from  the  pure  oil. 
Sandal-wood  oil  No.  I  with  14  per  cent,  of  cedar-wood  oil  No.  12 
required  14-5  cc.  weak  spirit. 
Sandal-wood  oil  No.  1  with  18  per  cent,  of  cedar-wood  oil  No.  12 
required  1 1-8  cc.  weak  spirit. 
Sandal-wood  oil  No.  1  with  41  per  cent,  of  cedar-wood  oil  No.  12 
required  5-0  cc.  weak  spirit. 
Sandal-wood  oil  No.  1  with  5  per  cent,  of  castor  oil  required  12-5 
cc.  weak  spirit. 
These  results  show  that  by  the  spirit  test  5  per  cent,  of  castor  oil 
or  14  per  cent,  of  the  most  soluble  cedar  oil  can  be  detected  in 
English  (East  Indian)  sandal-wOod  oil ;  had  one  of  the  less  soluble 
samples  been  used  a  smaller  proportion  would  have  been  rendered 
evident.  I  find,  in  fact,  that  10  per  cent,  of  sample  No.  11  can  be 
detected. 
Sample  No.  1  to  which  5-2  per  cent,  of  castor  oil  had  been  added 
required  for  saponification  1*45  per  cent,  of  potassic  hydrate,  indi- 
cating 5 -6  per  cent,  of  the  adulterant,  if  we  take  18*0  per  cent,  as 
the  percentage  required  by  castor  oil.  For  the  application  of  this 
test,  I  should  suggest  that  the  amount  of  KHO  required  in  excess 
of -io  per  cent,  should  be  multiplied  by  5-5  to  obtain  the  approxi- 
mate amount  of  fatty  oil  ;  thus  allowing  a  fair  margin  for  somewhat 
abnormal  samples  of  sandal-wood  oil. 
Sample  No.  4.. — So  far,  I  have  not  considered  Sample  4;  but  its 
great  age  is  alone  sufficient  to  cause  one  to  look  suspiciously  upon 
the  results  obtained.  In  odor  it  was  distinctly  different  from  either 
of  the  first  three  samples,  and  approached  No.  10  (cedar)  quite  as 
