SECTION ONE 



PHLOXIN B 



Michrome No. 206. Molecular weight 830. An acid dye, 

 pH j-^*. Solubility at 15° C; water 10-5%, absolute alcohol 5%. 



O 

 Br 



COONa 

 CI 



PYRONIN Y OR G 



Michrome No. 339. Molecular weight 303. A basic dye, 

 pH 2'0*. Solubility at 15° C: water 9%, absolute alcohol 0-5%. 



(H3C)2N- 



v/ 



On 



N(CH3)2 



+ 



ci- 



VIOLAMINE 3B 



Michrome No. 161. Molecular weight 764. An acid dye, 

 pH8-^*. Solubility at 15° C: water 5-25%, absolute alcohol 10-5%. 



SOgNa 



H5C2O 



COONa 

 CI 



OC2H5 



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



75 



