183 



PHILIPPINE RESINS, GUMS, AND OILS 

 Table 29. — Constants of chanipaka oil. 



Constants. 



Specimen No. 



Specific gravity 



30° 

 30°- 



.30° 

 D 



Refractive index N 



Ester number. 



Ester number after acetylating. 



1. 4640 

 124 



0. 9107 



1. 4688 



146 

 199 



According to Brooks, when champaka oil is heated, a large 

 part of it is polymerized to resin. The oil obtained by steam- 

 distilling consists largely of cineol. The solid which crystallizes 

 from the freshly prepared oil is probably a ketone compound. In 

 addition to iso-eugenol, the essential oil of yellow champaka 

 flowers contains benzoic acid, benzyl alcohol, benzaldehyde, cin- 

 eol, and p-cresol methyl ether. 



Michelia champaca is a small tree with spear-shaped leaves, 

 12 to 20 centimeters long and 2.5 to 6 centimeters wide. The 

 flowers are yellowish brown, very fragrant, and from 4 to 5 

 centimeters in length. They are highly prized by the Filipinos 

 and by them are made into necklaces. 



MICHELIA LONGIFLORA Blume. 



CHAMPAKANG-PUTl OIL 



Champakang-puti. 



Champaka oil obtained from this species has been exported 

 to Europe from Java. According to Brooks * the purified oil 

 is dark green in color. It possesses an intensely sweet, almost 

 nauseating odor, which is very difl'erent from that of the oil 

 obtained from the flowers of Michelia champaca. 



The constants of the oil are as follows : Specific gravity, 



0.897; ester number, 180.0; refractive index, N^^ =1.4470. 



The above <^onstants point to a rather large per cent of the 

 esters of fatty acids. According to Brooks the oil contains lin- 

 alool, methyl eugenol, methyl-ethyl-acetic acid, and acetic acid. 

 The odor of the oil is chiefly that of the methyl or ethyl ester 

 of methyl-ethyl-acetic acid. 



Michelia longiflora is a small tree with white flowers. It is 

 a native of Java and is occasionally cultivated in Manila. 



* Brooks, B. T., New Philippine essential oils. 

 Science, Volume 6 (1911), page 333. 



Philippine Journal of 



