Syonyms Name: C.I. 22310; C.I. Direct Red 1, disodium salt; C.I. Mordant Red 57; C.I. Direct Red 1 (6CI,7CI); C.I. Direct Red 1, disodium salt (8CI); disodium (3Z)-3-[2-(4'-{2-[(2E)-2-imino-8-oxo-6-sulfonato-2,8-dihydronaphthalen-1-yl]hydrazinyl}biphenyl-4-yl)hydraziny