12221-87-3 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 (9CI) 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 8003-63-2 C.I. 31560 C.I. 31565 C.I. Direct Black 9 (VAN) (8CI) Carbide Milling Black PLS Chrome Leather Black PLS Diphenyl Black FF Disodium 3-((4-((4-amino-6(or 7)-sulphonatonaphthyl)azo)phenyl)azo)-6-((2,4-diaminophenyl)azo)-4-hydroxynaphthalene-2-sulphonate EINECS 232-321-9 NSC 71962 Phenamine Black F Phenamine Black FCW Pontamine Fast Black CN