STAINING, PRACTICAL AND THEORETICAL 



CHLORAZOL FAST PINK BK 



Michrome No. 674. Molecular weight 991. An acid dis-azo dye, 

 pHS'S*. Solubility at 15° C: water 1-3%, absolute alcohol nil. 



SOgNa 



SOgNa j^Q 



CO 



HN 



SOsNa 



SOsNa 



CHLORAZOL PAPER BROWN 



Michrome No. 94. Molecular weight 704. An acid dis-azo dye, 

 pHS-<)S*. Solubility at 15° C: water 4-5%, absolute alcohol 1 -25%. 



COONa 



N=N 



N=N- 

 NaOaS 



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



46 



