Syonyms Name: C.I. 29160; C.I. Direct Red 23 (VAN); C.I. Direct Red 23, disodium salt; C.I. Direct Red 23; C.I. Direct Red 23, disodium salt; Direct Red 23; Scarlet 4BS; disodium 4-oxo-3-(2-{4-[(2-oxoethyl)amino]phenyl}hydrazinylidene)-6-({[(6E)-5-oxo-6-(2-phenylhydra