2-Naphthalenesulfonic acid, 3-[[4-[[4-amino-6(or 7)-sulfo-1-naphthalenyl]azo]phenyl]azo]-6-[(2,4-diaminophenyl)azo]-4-hydroxy-, disodium salt 8003-62-1 C.I. 31560 C.I. 31565 C.I. Direct Black 9 Carbide Milling Black PLS Chrome Leather Black PLS Diphenyl Black FF NSC71962 Phenamine Black F Phenamine Black FCW Pontamine Fast Black CN