182 



Cei'tain New Derivatives in the Aromatic Series. 



No. 11) ; with beta-naphtol also a crimson (sample No, 12). Naph- 

 tylamine-sulphonic acids generally gave reds. Benzoflavine is — 



NH, 



./ 



/^\ 



\/ N^ 



/' 



\c 



NH, 



Amidoazobenzene has been studied a great deal, but the writer 

 has been able to get new derivatives from it. The dyes now known 

 are Sudan III; Azo-Coccine 7B; Crocein B; Brilliant Crocein ; 

 Ponceau SS ; and Ponceau 5R. The author diazotized in the 

 usual manner, and made four different browns or drabs, and one 

 red, the last being made with the union of the diazotized amido- 

 azobenzene with the Bayer's acid, 2 : Y, and it was found to have 

 the formula, CgH^.N^N.CeH^.N^ N— C,„H5(S03Na).NH,. 



Ortho-Anisidine, CgH^(l)O.CH3.(2)NH2, has been used since 

 1818, when it was applied in the formation of Anisol Red, some- 

 times called Anisidine Ponceau. Azo Eosine is another derivative 

 from the ortho-anisidine. But para-Anisidine seems not to have 

 been used. Three new dyes were made, one a pink, by the appli- 

 cation of Schoellkopf's acid, 



C6H/O.CH3 



(N = N— C,„H^(a)OH 



(SOgNa)^. Specimen No. 13. 



The second an orange with Dahl's acid, 



C,H,(1)0.CH3 



(4)N = N— CioH,.NH2.S03Na.,2 : 5. Specimen No. 14. 



The third a Bordeau with beta-naphtol, 



C,H,(1)0.CH3 . 



(4)N = N— CioH6(b)OH. Specimen No. 15. 



