Syonyms Name: C.I. 23860; C.I. Direct Blue 53; C.I. direct blue 53 tetrasodium salt; C.I. Direct Blue 53, tetrasodium salt (8CI); Evans blue; Direct Blue 53; evans blue fluka; evans blue (C.I. 23860); tetrasodium 6,6-((3,3-dimethyl-(1,1-biphenyl-4,4diyl)bis(azo)bis(4-a