AmMay?iFoifrm'}     Oil  of  Sandalwood,  Lavender  and  Thyme.  225 
P  ==  santalol;  a  =  number  of  c.c.  of  normal  alkali  consumed  ;  and 
s  =  the  amount  in  grammes,  of  the  acetylized  oil,  used  for  saponifi- 
cation. 
The  following  equations  represent  the  reactions  involved: 
C15H25OH  +  (C2H30)20     =  C15H25O.COCH3  +  CH3C02H 
Santalol  -f-  acetic  anhydride  =  Santalol  acetate  -f-  Acetic  acid. 
C^H.^O.COCHg  +      KOH    =    C15H25OH    +  CH3C02K. 
Santalol  acetate  -|-  Potassium   =   Santalol      -f  Potassium 
hydrate.  acetate. 
The  samples  of  oil  examined  gave  the  following  results : 
Number. 
Specific  Gravity. 
150  C          250  C. 
Per  Cent, 
of  Santalol. 
Optical 
Rotation. 
Solubility  in 
70  Per  Cent.  Alcohol. 
Santalol 
Esters. 
Per  Cent.  of. 
1 
0-9767 
0-9724 
97-16 
-170  15' 
1  in  5 
3'o6 
2 
0-9727 
°'97°7 
93'64 
— i5°  16' 
1  in  5 
4-10 
3 
0-9747 
o-9739 
91-70 
-14°  56' 
1  in  5 
2'93 
4 
0*9666 
0-9601 
90-12 
1  in  5 
1-48 
5 
0-9716 
0-9685 
92-87 
-17°  2' 
1  in  5 
1  "43 
6 
0*9626 
0*9600 
75  00 
-  7°  4' 
1  in  5 
2*67 
7 
0-9721 
0-9681 
96-34 
— 160  36' 
1  in  5 
8 
0-9713 
0-9678 
94-53 
-160  56' 
1  in  5 
3-6i 
9 
0  9734 
0*9696 
90-87 
-13°  48' 
1  in  5lA 
Remarks. — No.  6  is  undoubtedly  adulterated.  Nos.  3,  4  and  9 
fall  below  the  standard,  yet  the  analyst  would  hardly  call  them 
adulterated,  but  rather  of  secondary  quality.  The  percentage  of 
ester  does  not  appear  to  be  a  deciding  factor  with  these.  ' 
OIL  OF  LAVENDER. 
An  examination  of  four  samples  gave  the  following  results  : 
Number. 
Specific  Gravity 
at  150  C 
Solubility  in 
70  Per  Cent.  Alcohol. 
Optical 
Rotation. 
Per  Cent, 
of  Ester. 
1 
0-8985 
1  in  3 
—6°  6' 
25-70 
2 
0*8989 
1  in  3 
-2°  54' 
34-36 
3 
0-8892 
1  in  3 
-5°  9' 
31-42 
4 
0-8830 
1  in  3 
-3°  4i' 
28-29 
The  above  samples  all  represent  oils  of  good  quality. 
