1918 
368 Philippine Journal of Science 
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 
+ ; degree unknown. 
Viscosity (at 20° C.) 
1.60 
Fractional distillation : 
Per cent. 
Below 210 
0.7 
210 to 230 
14.0 
230 to 240 
22.5 
240 to 260 
27.0 
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. 
B 
C 
D 
PRINCIPAL CONSTITUENTS OF CAMPHOR GREEN OIL 
Acid and phenol. — Besides caprylic acid and C 9 H 16 0 2 , which 
are known as the constituents of camphor green oil, the presence 
of the following acids has been newly proved: 
Methylene-ether-3, 4-dioxybenzene-l-carboxylic acid (CsHeCh)- 
Laurie acid (C 12 H 24 O 2 ). 
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 
Acid value. 
3.14 
5.49 
2.58 
