MUSK. 401 



Limpricht, this method has not given equally satisfactory results 

 with all bodies, and although Spindler has occasionally noticed 

 deviations amounting to from 3 to 4 per cent., such differences 

 might he disregarded in the present instance, where only 

 approximate results were aimed at. The nitro-determination of 

 the well- mixed and dried artificial musk gave the following results 

 with four different samples : — 



L = 3-51 per cent. XOo 



Average = 3*252 per cent. NOo. 



" The percentage proportion of X Oo in tri-nitrobutyl-toluol being 

 48-76, it would follow that the artificial musk of commerce contains 

 on an average 6*669 per cent. of tri-nitrobutyl-toluol; but making full 

 allowance for the imperfections in respect of unequal reduction in 

 the case of different nitro-bodies which exist in the above- 

 mentioned process of nitro-determination, the conclusion is justified 

 that "Musk-Baur" consists of a mixture of at least 90 parts of 

 acetanilide {" antifebrin "), with, at the most, 10 parts of the 

 odorous body, most probably tri-nitrobutyl-toluol. 



"The body melting at 111^ to 113^, already characterised above 

 as acetanilide, showed, when experimentally subjected to the test 

 for nitro-determination, a complete absence of nitro-groups. On 

 the other hand the presence of 40'9o per cent, of IST Oo was proved 

 in the residue of the petroleum-ether extraction, a substance 

 appearing as a mass of crystals coloured dark through decomposition. 

 It may therefore be assumed that this residue did not consist 

 entirely of pure tri-nitrobutyl-toluol (requiring, as already stated, 

 48'76 per cent, of N Oo) and was still mixed to some extent with 

 acetanilide. Unfortunately the smallness of the quantity of the 

 residue rendered further purification and identification with rri- 

 nitrobutyl- toluol impossible." 



" In common with all other sellers and users of ' Musk Baur,' we 

 had up to this point been under the impression that the commercial 

 product consisted of the pure patented substance, a view which 

 was certainly justified by the expensiveness of the article. But 

 if, probably on account of greater convenience in use, this artificial 

 cc 



