1-NAPHTHALENOL, 5-CHLORO-2-((2-HYDROXY-4-NITROPHENYL)AZO)-, COBALT SALT (2:1) 5-Chloro-2-((2-hydroxy-4-nitrophenyl)azo)-1-naphthalenol cobalt 61969-42-4 C.I. Solvent Blue 53 Orasol Navy Blue 2RB