212 The Philippine Journal of Science 1917 



Service for testing as to purity. It was marked: "Finest oil 

 of Chaulmoogra, Stanistreet Brand." It is very similar in prop- 

 erties to sample 7. 



Sample 9. — This oil is identical in all respects with sample 7, 

 being obtained by expression from seeds from Assam, marked 

 "Gynocardia odorata." 



Sample 10. — This oil was submitted by the Philippine Bureau 

 of Supply for testing as to purity. It was marked: "Crude 

 Chaulmoogra Oil. A. S. Watson, Hongkong China." The oil 

 was very similar to sample 1. 



A survey of the constants of the oils described above shows 

 that they are different from the constants given by Power and 

 BarrowclifF 14 for the oil from Gynocardia odorata and that the 

 name Gynocardia odorata used for some of the oils examined 

 by us is incorrect, but that they are in substantial agreement 

 with their results for the chaulmoogra and the hydnocarpus oils. 



CHEMICAL EXAMINATION OF CHAULMOOGRA OIL 



A more thorough chemical examination of chaulmoogra oil 

 was made for the purpose of substantiating the results of either 

 Power or those who disagree with him. For this examination 

 samples 2 and 5 were chosen. They were saponified with alco- 

 holic potash, and the free acids were obtained by acidification 

 and extraction with ether. Table III gives the properties of 

 the free acids. 



Table III. — Properties of the free acids of chavlmoogra oil. 





Sample No.— 



2 1 6 



Specific rotation in chloroform for sodium light at 30°C _ _- 



+54.00 ! +47.40 

 101.3° | 99.7° 

 "35.31 a 34. 95 

 38-39 ! 3S-40 









These acids were treated in the manner adopted by Power 

 for the separation of chaulmoogric and hydnocarpic acids. 



Not much difficulty was experienced in obtaining a body from 

 No. 5 that melted at 67° to 68 °C. when recrystallized from al- 

 cohol, but considerable difficulty was experienced in purifying 

 the fraction from No. 2 sufficiently to raise its melting point to 



" Journ. Chem. Soc. London (1905), 87, 887. 



