About Methylene blue
About Ext.D&C Blue No.1
About Aizen Methylene Blue BH
About Aizen Methylene Blue FZ
About Atlantic Methylene Blue BB
About Chromosmon
About thiazine dye
About basic dye
About urinary tract antiseptic
About sulfonium
About tertiary amine
About nitrogen heterocyclic compound
About aromatic amine
About polynuclear aromatic compound