TESTS FOR METHYL ALCOHOL BY E. W. TODD, B. A. 149 



Table I 





Methylated spirits 





Methylated spirits 



with a few drops 



Rum 



10% soln. 



of methyl alcohol 



say 10% 



in 10m. 



in 10m. 



in 20m. 



practically, no 



very distinct violet 



no violet 



colour. 



colour on looking 

 down the tube. 



colour. 



in 30m. 



in 20m. 



in 3 hrs. 



distinct though 



darker colour. 



no violet 



faint violet. 





colour. 



Some further results are given in Table II. 

 Table II 







Ethyl 











alcohol 





Ethyl alcohol 



Methyl 



Ethyl 



5% 



Methylated 



with a few 



alcohol 



alcohol 



and 



spirits 



drops of forma- 



2% 



5% 



xMethyl 

 alcohol 



10% 



ldehyde added 

 before Schiff's 







2% 





reagent 



after 10m. 



after 10m. 



after 10m. 



after 10m. 



immediate 



violet-pink 



no colour 



violet-pink 



violet-pink 



violet colour 



colour. 





colour. 



colour. 





The older U. S. P. Pharmacopeia method was now tried, 

 but was found to be unsatisfactory for the strengths used. 



(1) Methylated spirits 10% — Oxidized by copper spiral 

 in beaker of cold water, the liquid then boiled to 

 drive off the acetaldehyde formed. 



Result: A yellowish coloration obtained. 



