

158 Report of Schimmel § Co. April/October 1917. 



the presence of indole and of scatole in perfumes in a similar manner. He substratifies 

 an emulsion containing scatole, to which a few drops of dimethylaniline have been added 

 in a test tube with concentrated sulphuric acid; a violet ring is then formed on the 

 surface of contact which is still plainly visible even in dilutions of 1:1000000. This 

 violet compound is soluble in chloroform. If one substitutes citrale for dimethylaniline, 

 scatole produces a red, indole a yellow colouring. The following test is also exceedingly 

 sensitive: — 5 ccm. of a dilute indole or scatole solution are mixed with a few drops 

 of a 5 per cent, solution of vanillin in 95 per cent, alcohol and 3 or 4 drops of hydro- 

 chloric acid are then added to the mixture. The presence of indole is indicated by a dark 

 orangered colouring, whereas the presence of scatole shows itself only after heating by a 

 dark violet colouring. This reaction is still visible in dilutions of 1 : 2000000 to 5000000. 



The reduction and hydrolysis of 2,4,6-trinitro-3-tQrt.-butyl-\-rnethylbenzene and of 

 trinitro-tevt-butylxylene have been described on page 95 of this Report. 



Schimmel $ Co.'s Printing Office, Miltitz near Leipzig. 



