STAINING, PRACTICAL AND THEORETICAL 



ANILINE BLUE, AQUEOUS 



Michrome No. 167, Molecular weight 738. An acid triphenyl- 

 methane dye, pH 6-^*. Solubility at 15° C; water 50%, absolute 

 alcohol nil. 



SOsNa 



NH2 



SOgNa 



ANILINE BLUE, ALCOHOLIC 



Michrome No. 221. Molecular weight 490. A basic tripheiiyl- 

 methane dye. Solubility at 15° C; water nil, absolute alcohol i'5%. 



H 



-N— . 



— C 



ci- 



* tO/ ; 



1% in neutral distilled water; see pages 17 and 29. 



66 



