350 Philippine Journal of Science 19 1» 



The first fraction is pale green and less viscous, while the 

 second and third are rather sticky, yellowish in color, and 

 gradually crystallize when fed with a piece of the crystals ob- 

 tained from the crude oil. 



It is obvious that the main part of the neutral oil consists of 

 the second and third fractions, the principal ingredient of which 

 is the same substance as that crystallized from the crude oil. 



Five grams of the crude oil are placed on the surface of an 

 absorptive porcelain plate. When the oil is entirely absorbed, 

 the crystals are dissolved in absolute alcohol, and the solution 

 is diluted with one-fourth its volume of water and filtered. The 

 precipitate thus obtained is recrystaliized from 70 per cent 

 alcohol and dried. 



The melting point of these crystals is 91.2° to 91.5° C. An 

 elemental analysis indicates that these crystals are a compound 

 belonging to the sesquiterpene alcohols. 



0.0995 gram of crystals gave 0.2926 gram C0 2 and 0.1046 gram H 2 0. 



Required for _ , 

 Per cent. Per cent - 



C 81.08 80.20 



H 11.71 11.66 



The optical rotatory power of this substance dissolved in 

 chloroform is —30°, approximately that of guajol (—29.8°), 

 which belongs to the sesquiterpene alcohols. Testing many other 

 important chemical reactions, Mr. Kafuku came to the conclusion 

 that the crystal is nothing but guajol. 



An elemental analysis of the first fraction of the neutral oil 

 is carried on ; and it is proved that the fraction also consists of 

 a sesquiterpene alcohol, although it does not contain the crystal. 



0.1194 gram of crystals gave 0.3504 gram CO2 and 0.1206 gram H 2 0. 



Required for Found 



C r H 2(I 0. Percent. 



Per cent. 



C 81.08 80.08 



H 11.71 11.30 



Phenol and acid, — The neutral oil which is separated from 

 sodium hydroxide solution is washed with an aqueous solution 

 of sodium chloride. The sodium chloride and the sodium hy- 

 droxide solutions are mixed; acids and phenols which are con- 

 tained in this solution are separated by 5 AT sulphuric acid and 

 extracted three times with ether. The ether solution is treated 

 three times with 5 per cent solution of sodium bicarbonate in 

 order to separate the acids from the phenols. It is estimated 



