PHILIPPINE TEEPENES AND ESSENTIAL OILS, III. 



125 



( h ) The resin oils were redistilled at ordinary pressure, giving two fractions ; 

 these are fractions numbered 2 and 3. 



(2) 180° to 225°, a light brown oil, 85 grams. 



(3) 225° to 310°, a blue, fluorescent oil, 210 grams. 



Various determinations were now made upon these three oils bj' Mr. Mariano 

 Vivencio del Eosario of the Bureau of Science as follows : 



No. 



Specific 

 gravity, 



20° 



1^ 



Index 

 number. 



Saponifi- 

 cation 

 number. 



-•Void 

 number. 



1 

 2 

 3 



0.9089 

 0.8882 

 0.9387 



268.3 

 192.1 

 120.9 



4.01 

 10.7 

 12.75 



1.8 

 23.0 

 18. 



The properties of the resin oil, fractions (2) and (3) united, were as follows: 

 Specific gravity, 0.9215; index number, 144.6; saponification number, 12.07; acid 

 number, 19.7. 



These oils, when extracted with alkali, washed, dried, etc.. give a light green, 

 fluorescent oil of a rather pleasani odor. 



( 9 ) Many attempts were made to dissolve balao resin in linseed oil or turpen- 

 tine, or to treat it with driers to give a quicker drying varnish. 



Balao is completely and easily soluble in hot linseed oil, but on cooling the 

 whole separates out, constituting a jelly which is not very soluble in turpentine. 

 However, if ialao is heated with linseed oil to 300° for six hours and then two 

 volumes of turpentine added, about 75 per cent of the resin remains in solution 

 and this solution, when filtered, gives a very satisfactorj' varnish. Additions of 

 lead oxide, lead linoelate, manganese borate to halao resin, with subsequent boiling, 

 did not seem to increase the drying properties. Terpineol, in which many 

 unmelted resins dissolve, gave no better results. 



THE SESQUITERPENE FKOJI BALAO KESIX. 



I consider that, because of the narrow range of the boiling point of 

 the fraction 128° to 131° at 13 millimeters, an individual sesquiterpene 

 is contained in balao resin. Six hundred grams of this sesquiterpene 

 were distilled three times in vacuo over sodium, the resulting oil being 

 almost colorless, with the peculiar pleasant odor of the resin, reminding 

 one slightly of oil of cedar. 



This oil had the following constants: 



Boiling point at 8 millimeters, 118° to 119° 



-116.4 

 refraction : 



n30!=i.4956; A^ = - 

 D D 



specific gravity, §0!_o 9104 ; 

 40 



ester and saponification numbers=0. Molecular 



tor CsHo^K 



Found 



(per cent). 



(per cent) 



66.15 



65.9 



This latter number shows that the sesquiterpene belongs to the bicyclic series, 

 with two double bonds and one bridge bond. 



The sesquiterpene, isolated in the manner described above, was now distilled at 

 ordinary pressure; 150 grams of the oil passing over completely between 261° to 

 82592 3 



