Summary: Alfa Chemistry offers an extensive catalog of building blocks, reagents, catalysts, reference materials, and research chemicals in a wide range of applications. We supply tetrasodium 4,4'-[carbonylbis[imino(5-methoxy-2-methyl-4,1-phenylene)azo]]bis[5-hydroxynaphthalene-2,7-disulphonate] (CAS:1937-34-4). More information please visit the website: https://www.alfa-chemistry.com/tetrasodium-4-4-carbonylbis-imino-5-methoxy-2-methyl-4-1-phenylene-azo-bis-5-hydroxynaphthalene-2-7-cas-1937-34-4-item-92812.htm