THE PHILIPPINE 



Journal of Science 



A. Chemical and Geological Sciences 

 and the Industries 



Vol. VIII FEBRUARY, 1913 No. 1 



METHYL SALICYLATE IV. 1 THE SAPONIFICATION OF METHYL 



SALICYLATE, METHYL BENZOATE, V AND THE METHYL 



ETHER OF METHYL SALICYLATE 



By H. D. Gibbs, 2 R. R. Williams, 



(From, the Laboratory of Organic Chemistry, Bureau of Science, 



Manila, P. I.) 



and 



A. S. Galajikian 3 



(From the Department of Mathematics, University of the Philippines, 



Manila, P. I.) 



Five text figures 



In the first paper on this subject it was shown that salicylic 

 acid could be accurately determined in the presence of its methyl 

 ester by first adding an excess of sodium hydrogen carbonate 

 solution, which will unite with the acid to form sodium salicylate, 

 and then shaking out the ester with a suitable solvent such as 

 chloroform. The principle of this separation depends upon the 

 fact that the rate of saponification of the ester by sodium hy- 



X I. The separation of salicylic acid from methyl salicylate and the 

 hydrolysis of the ester, by H. D. Gibbs, This Journal, Sec. A (1908), 3, 

 101; Journ. Am. Chem. Soc. (1908), 30, 1465; II. Solubility in water at 

 30°, by H. D. Gibbs, This Journal, Sec. A (1908), 3, 357; III. The colora- 

 tion of methyl salicylate and some allied compounds in the sunlight, by 

 H. D. Gibbs, R. R. Williams, and D. S. Pratt, ibid (1912), 7, 79. 



'Associate professor of chemistry, College of Medicine and Surgery, 

 University of the Philippines. 



* Assistant professor of mathematics, College of Civil Engineering, 

 University of the Philippines. 



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