58 oil-bearing seeds indigenous to queensland. 



The JIesin of Callophyllum inophyllum Oil. 



The Indian oil is stated to contain 18.26 j^er cent 

 of saponifiable resin Avhich is sei)aral>le by solution in hot 

 dilute alcohol. 



This treatment, however, removes a portion of free 

 fatty acid and the separation was effected by the esterifica- 

 tion method of Twitchell ; 6.7 per cent of resin acid was 

 obtained by this method as a dark viscid oil with a liitter 

 taste. Its potash salt was soluble in excess of alcoholic 

 potash, and it evidently possesses a high iodine absorption. 

 It strikes an intense l)lue-])lack colouration with alcoholic 

 ferric chloride. 



The Composition of Callophyllum inophyllum Oil. 



Fendler. quoted in the Agricultural Ledger (loc. cit), 

 states this oil to contain palmitin, stearin and olein. 



The fatty acids free from resin were found to have 

 a neutralisation value of 19!>.8 corresponding to a mean 

 molecular weight of 281.0. The iodine value is 78.0. 



Separation of the liquid and solid fatty acids showed 

 73 per cent liquid and 27 per cent solid acids. 



The iodine value of the liquid acids is 86.0 and jire- 

 cludes the presence of acids of higher degree of unsaturation 

 than oleic acid. Fractional crystallisation of the solid 

 acids from alcohol gave the following fractions : (1) incom- 

 pletely melted at 85°C. ; (2) M. Pt. 69.5° C. ; (3) M. Pt. 

 68° C. ; (4) M. Pt. 62° C. Further fi'actionation of (1) 

 gave a small proportion of a crystalline substance melting 

 at 110° - 112° C, which was not identified and prol^alily 

 s not a fatty acid. 



Fractions (2) and (3) comprised the major portion 

 and are stearic acid. Fr.iction (4) coincides in melting point 

 with palmitic acid. , 



Hence the glycerides of Callophyllum oil are composed 

 principally of olein and stearin with a smaller ]>roportion 

 of palmitin. The high acid number is due to the presence 

 in the normal oil of a considerable proportion of free fatty 

 Acid. notablv stearic acid. 



