A histological stain for basophil elements and gonococcus. High Purity Grade EM (555nm, 50% ethanol) >50,500

A metachromatic stain of cytoplasm and nuclei. High Purity Grade Solubility test: Passes EM (543nm, 50% methanol): 86,900 Dye content >88% A550 >0.65 Staining, leilson procedure: Passes

Used to stain RNA. Also called Pyronin G or Pyronin J. Melting Point: 250-260°C Dye Content: 45+%