Methyl Violet 10 B SKU: SKU RXSOL-12-8531-031 Product Category: Category Detergent & Soap-12 Variations Methyl Violet 10 B Short Description Short Description Methyl Violet 10 B also known as Crystal violet or gentian violet or hexamethyl pararosaniline chloride. It is a triarylmethane dye used as a histological stain and in Gram s method of classify.