Antiseptic Action and Chemical Constitution. 



363 



needles, very slightly soluble in cold water, soluble in hot water with a scarlet 

 colour. 



N 



CH, 



h = n U\A/ nh \ hcl 



A x 



CH 3 CI 



[87.] 2.Amiiionaphtho-7 .ariiino-b.methylphenazine methochluridc. — The pre- 

 paration was carried out as above, using proportionate quantities of 

 benzene-azonaphthylamine hydrochloride and one - and - a - half times the 

 amount of glycerol, and heating at 120° for 3|- hours. The hot aqueous 

 solution of the product was filtered from insoluble matter, and the colouring 

 matter precipitated with hydrochloric acid and salt. It was re-crystallised 

 from dilute hydrochloric acid from which it separated in small green crystals. 

 It dissolves in water with a scarlet colour similar in tint to the other two. 



/\ 



N 



Jnh,hci. 



N 



/X 



CH 3 CI 



[88.] 2.Methylainino-7.amino-o.G.dimethylphenazine methochloride. — The sub- 

 stance was prepared from nitrosomethylaniline hydrochloride and o-amino- 

 7>-dimethyl toluidine dissolved in alcohol according to the quantities given in 

 D.R. Patent 80758.* The mixture was boiled for 6 hours. The scarlet 

 colour developed in a few minutes and intensified rapidly, until signs of 

 precipitation appeared when the liquid was somewhat concentrated and 

 cooled. The precipitate was filtered and washed with a little alcohol. The 

 phenazine compound consists of a green crystalline powder which dissolves in 

 water with a more magenta colour than the previous compound. 



N 



ch/yyY H3 



CHsNhI^I IJnHjHCI. 

 N 



/\ 

 CH 3 CI 



[93.] N-Methyltetrahydroqidnoline-2.mninophenazine methochloride. — The 

 tetrahydroquinoline and its N-methyl derivative were prepared by the 



* ' Friedlander,' vol. 4, p. 376. 



