Notices  of  Judgment  have  been  published  in  reference  to  sandalwood
oil:


No.
Sp.  gr.
at  25°  C.
Opt.  Rot.
at  20°  C.
Santalol
Percent.
Remarks.
3547
3558

0.966

-23.1°

76.9
71.2

Saponification  value  7.7.     Insolu-
ble in   5  to   10  volumes  70%
alcohol.
Insoluble  in  10  volumes  70%  alco-

hol.    Foreign  terpenes.
The  author  has  examined  a  number  of  samples  of  commercial  sandal-
wood oil  and  the  results  of  analysis  are  shown  in  the  table  on  page  364.
The  fact  must  not  be  overlooked  that  fixed  oils  when  added  to
sandalwood  oil  apparently  increase  the  percentage  of  santalol  when
the  United  States  Pharmacopoeial  method  of  acetylization  and
saponification  is  employed  and  the  calculation  of  santalol  is  based
upon  the  U.  S.  P.  formula.  This  is  noticeable  in  the  analysis  of
Sample  No.  11.  This  would  be  equally  true  of  other  volatile  oils
when  determining  higher  alcohols  by  above  method.  The  author
employed  this  method  on  pure  cottonseed  oil  and  used  the  formula  for
the  calculation  of  santalol  and  it  gave  results  indicating  96.93  per
cent,  of  santalol.  The  absence  of  fixed  oils  must  be  ascertained
before  the  estimation  of  santalol  becomes  of  any  analytical  value  in
determining  the  purity  of  the  oil  under  consideration.
In  1920 1  the  author  called  attention  to  the  fact  that  the  absence  of
saponifiable  fixed  oils  should  always  be  proven  in  the  analysis  of
sandalwood  oil;  and  later,  C.  W.  Harrison2  suggested  a  method  for

1 J.  A.  Ph.  A.,  1920,  9,  37.
« J.  A.  O.  A.  C.,  1921,  4,  426.
364


PHARMACEUTICAL   AND   FOOD   ANALYSIS.
No.
Sp.  Gr.
at  25°  C.
Ref.  Ind.
at  20°  C.
Opt.  Rot.
at  25°  C.
Santalol.
Remarks.
