CI 25380; CI NO 25380; DIRECT RED 75 (C.I. 25380); SIRIUS ROSE BB, FOR MICROSCOPY; Direct Fast Pink BK; Vital New Red (C.I. 25380); Aizen Primula Pink 2BLH special; tetrasodium 5,5'-[carbonylbis[imino(2-sulphonato-4,1-phenylene)azo]]bis(6-amino-4-hydroxynaphthalene-2-sulphonate); Chlorazol fast pink; Vital New Red; C.I. Direct Red 75; Solar Rubine CB; Aizen Primula Pink 2BLH; Direct Fast Pink B; Benzo Fast Pink 2BL; Chlorazol Fast Pink BK