188 Drs. Muspratt and Hofmann o« Toluidine. 



It is very probable that the boiling-point of nitrotoluide is 

 higher, and as for toluole its boiling-point by Deville also does 

 not appear exact. 



We will prove in a future paper that dracyle, a hydro- 

 carbon obtained in the destructive distillation of dragon's 

 blood by Bondault and Glenard *, is identical with toluole. 

 Glenard and Bondault give as the boiling-point of their li- 

 quid 106° C. According to this determination the difference 

 between it and benzole would only be 20°. 



From the preceding remarks an uncertainty is removed 

 which has reigned with regard to the boiling-point of aniline, 

 which according to Fritzsche is 228° C. ; his product being 

 obtained from indigo. The foregoing statement refers to ani- 

 line (cyanole) procured from coal-gas naphtha. It is there- 

 fore perfectly clear that there must have been some error in 

 Fritzsche's determination. 



Toluidine shares with aniline, and in general with the bases 

 obtained in a similar manner, the property in an acid solu- 

 tion of imparting an intense yellow colour to fir-wood and 

 the pith of the elder-tree. But it does not afford the beau- 

 tiful reaction with hypochlorite of lime which characterizes 

 aniline ; an aqueous solution of toluidine when mixed with li- 

 quid chloride of lime gives a pinkish hue. It also differs 

 from aniline in its behaviour towards fuming nitric acid and 

 chromic acid. Toluidine gives with nitric acid a fine scarlet 

 colour, whereas aniline assumes an indigo blue tinge. 



With chromic acid it gives a reddish brown precipitate, 

 which appears to be chromate of toluidine. It does not in- 

 flame when brought into contact with crystals of chromic acid. 



The following will sufiice as to the behaviour of toluidine 

 towards the solutions of the metallic oxides. 



Sidphate and chloride of copper give greenish precipitates, 

 possessing a crystalline aspect. • Chloride of iron deposits hy- 

 drated peroxide of iron when heated with toluidine. 



Toluidine gives with nitrate of silver a white cr3'stalline 

 precipitate, evidently a double salt, which easily blackens. 

 This base gives with chloride of platinum and chloi'ide of pal- 

 ladium beautiful orange-yellow crystalline precipitates, of 

 which the latter is somewhat lighter than the former. 



Toluidine furnishes no particular appearances with other 

 reagents. 



Compounds of Toluiditie. 



The same extraordinary capacity for crystallizing which we 

 have in the salts of aniline also distinguishes those of toluidine. 



* Journal de Pharm. ct de Chem., 3 ser. vol. vi. p. 250. 



