68400-33-9 Acetic acid, 2,2'-(carbonylbis(imino(1-hydroxy-3-sulfo-6,2-naphthalenediyl)azo-3,1-phenyleneimino))bis(2-oxo-, tetrasodium salt EINECS 270-022-5 Tetrasodium 2,2'-(carbonylbis(imino(1-hydroxy-3-sulphonato-6,2-naphthalenediyl)azo-3,1-phenyleneimino))bis(2-oxoacetate)