SECTION ONE 



VICTORIA BLUE 4R 



Michro?ne No. 307. Molecular weight 520. A basic triphenyl- 

 methane dye, ^7/5 -425*. Solubility at 15° C; water 3%, ab- 

 solute alcohol 20%. 



N(CH3)2 



N(CH3)2 



+ 



ci- 



WOOL GREEN S 



Michrome No. 162. Molecular weight 577. Aji acid diphenyl- 

 naphthyhiiethane dye, pHy2^. Solubility at 15° C; water 4%, 

 absolute alcohol nil. 



N(CH3)2 



N(CH3)2 



+ 



SOsNa 



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



73 



