SECTION ONE 



CRYSTAL VIOLET 



Michrome No. 103. Molecular weight 408. A basic triphenyl- 

 methane dye, pH 6-6*. Solubility at 15° C; water 9%, absolute 

 alcohol 8-75%. 



(H3C)2N- 



— N(CH3)2 



N(CH3)2 



ci- 



FAST GREEN FCF 



Michrome No. 135. Molecular weight 809. An acid triphenyl- 

 methane dye, pH 6-8*. Solubility at 15° C: water 4%, absolute 

 alcohol 9%. 



SOsNa 



NaOaS 



* ,0/ ,- 



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



67 



