184 Certain New Derivatives in the Aromatic Series. 



On diazotizing two kilos of this with seven hundred grammes 

 of sodie nitrite and twelve hundred grammes of hydrochloric acid 

 of twenty Baume, the diazotized compound will link with different 

 naphtols, naphtylaniines, and their sulphonic acids, to give the re- 

 sults herewith appended. 



beta-Naphtylaminc, ..... Brown. 



beta and gamma naphtylamine, . . Red, Sample No. 6. 



Neville and Winther's, Naphtol-sul- 



phonic, 1:4, Red. 



Schgeffer's acid, naphtol-sulphonic, 2:6, . Purple. 



alpha-Naphtol, Orange, Sample No. 1 



beta-Naphtol, Rose, Sample No. 8. 



The reaction is facilitated by stirring, and by heating the liquid 

 to about 80 degrees Centigrade. The dye is precipitated by the 

 addition of sodic acetate and common salt; then it is pressed, dried, 

 and analysed. 



The dyes produced by the union of the diazotized diamido-fluoren 

 and the different naphtylamine sulphonic acids, are all reds, soluble 

 easily in water with a yellowish-red coloration ; with hydrochloric 

 acid they turn to a pink, if the acid is fully concentrated; with 

 concentrated sulphuric acid the dyes dissolve, and give a violet 

 similar in hue to the Hofmann's violet ; with alkalies a yellow pre- 

 cipitate is produced. 



It was desired to find out whether the diazotization effected both 

 the amido groups, or only one. Whether the formula of the new 

 coloring matter, in the case, for instance, of beta-Naphtol, was 



CgHgCN : NC,oHg.OH(beta) ) CgHgCN : NC,oHg.OH(beta) ) 



-CH., or 



-CH„ 



C,H3(NH,) C.K^N : NC\„H,.OH(beta) ) 



Analysis showed that both amido groups were diazotized and 

 were linked. 



II. The second line of work was begun with the diphenyl-methane 

 compound, Auramine, which has the formula, 



(C,H-N(CH3), 

 CH^NH 



(C,H-N(CH3),.HC1. 



Aurnmine should be used, for Auramine I or II is not pure. 



