3g8 Philippine Journal of Science wi» 



Table XXIV. — Physical and chemical properties of camphor green oil — Ctd. 



# SAMPLE D. 



Color Greenish brown. 



Specific gravity (at 20° C.) 0.981 



Refractive index (at 20° C.) 1.503 



Optical rotatory power +J degree unknown. 



Viscosity (at 20° C.) 1.60 



Fractional distillation: Percent. 



Below 210 0.7 



210 to 230 14.0 



230 to 240 22.5 



240 to 260 2 r '.0 



260 to 310 32.0 



Residue 3.0 



The fractional distillation of sample A has been carried on 

 and the fractions thus obtained have been used in further inves- 

 tigation. It has been distilled under reduced pressure (50 to 

 55 millimeters) to prevent decomposition. 



Acid and ester value of camphor green oil. — Two grams of 

 the sample are neutralized with 0.5 N alcoholic solution of po- 

 tassium hydroxide, using phenolphthalein as an indicator. After 

 adding 25 cubic centimeters of the same solution, it is refluxed 

 on a water bath for twenty minutes. Adding 0.5 N solution 

 of sulphuric acid, the ester value is estimated. Ester value, 

 0.66. 



Some 0.1 N solution of potassium hydroxide is added to 25 

 grams of the sample, and its acid value is estimated. 



Sample. Acid value. 



B 3.14 



C 6.49 



D 2.58 



PRINCIPAL CONSTITUENTS OF CAMPHOR GREEN OIL 



Acid and phenol — Besides caprylic acid and C.,H 16 0,, which 

 are known as the constituents of camphor green oil, the presence 

 of the following acids has been newly proved: 



MethyIene-ether-3,4-dioxybenzene-l-carboxylic acid (CsHoCs). 

 Laurie acid (CuHmOj). 

 An unknown acid. 



The green oil contains about 1.5 per cent of phenols. The 

 composition of this phenolic mixture is highly complicated; at 

 present the presence of eugenol and carvacrol only has been 

 proved. 



Aldehyde and ketone. — The percentage of aldehyde and ketone 



