STAINING, PRACTICAL AND THEORETICAL 



SOLOCHROME CYANIN R 



Michrome No. 750. Molecular weight 536. Afi acid dye of the 

 kydroxy-triphenylniethane series^ pHz-T,*- Solubility at 15° C; 

 water 7%, absolute alcohol ^%. 



NaOsS 



COONa 



OH 



VICTORIA BLUE B 



Michrome No. 148. Molecular weight 506. A basic diphenyl- 

 naphthyhnethane dye, pH 2-6*. Solubility at i^° C: water ^'2%, 

 absolute alcohol 8 -25 % . 



N(CH3)2 



N(CH3)2 



+ 



ci- 



* tO, 



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



72 



