JACKSON AND GALLIVAN. — TRIBROMANILINB. 47 



and adding a strong solution of hydrochloric acid * when the salt was 

 precipitated. 



0.4976 gram of the salt gave, after the base had been removed by 

 ammonic hydrate, 0.1911 gram of argentic chloride. 



■Calculated for CeHjBrjNHsCl. Found. 



Chlorine 9.69 9.50 



Properties. — The salt crystallizes unaltered in white needles from 

 hot water to which a few drops of hydrochloric acid have been added ; 

 but if it is boiled with water alone, it undergoes a partial decompo- 

 sition. This salt is, therefore, much more stable than the chloride of the 

 NHol, Brg 2, 4, 6 tribromaniliue, which is decomposed completely by 

 water. It is slightly soluble in benzol ; insoluble in ligroiu or ether. 



Bromide of Tribromaniline, NHol, Erg 3, 4, 5. 



This salt was made by adding a strong aqueous solution of hydrobromic 

 acid to two grams of the tribromaniline dissolved in benzol. The white 

 precipitate formed was filtered out, washed with benzol, dried, and analyzed 

 with the following result : — 



0.3841 gram of the salt gave, after the base had been precipitated with 

 ammonic hydrate, 0.1771 gram of argentic bromide. 



Calculated for CuH^BrgNHaBr. Found. 



Bromine 19.47 19.63 



The bromide resembles the chloride in its properties, and, although 

 slightly more unstable, is still much more stable than the bromide of the 

 tribromaniline NHjl, Brg 2, 4, 6. 



Sulphate of Tribromaniline NHjl, Brg 3, 4, 5. 



To prepare this salt three grams of the tribromaniline were heated 

 with moderately strong sulphuric acid. The tribromaniline soon dis- 

 solved, and on cooling the solution deposited fine large plates of the 

 sulphate, which were purified by recrystallization from water slightly 

 acidified with sulphuric acid, dried, and analyzed with the following 

 result : — 



* In order to obtain the chloride of the NH2 1, Brg 2, 4, 6 tribromaniline, gaseous 

 hydrochloric acid must be used. 



