DIRECT FAST BROWN M DIRECT BROWN M disodium 5-[[4'-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo][1,1'-biphenyl]-4-yl]azo]salicylate Benzoic acid, 5-4-(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo1,1-biphenyl-4-ylazo-2-hydroxy-, disodium salt C.I. Direct brown KX Direct brown 2 (C.I. 22311) 5-[[4'-[(7-Amino-1-hydroxy-3-sulfo-2-naphtyl)azo]-1,1'-biphenyl-4-yl]azo]-2-hydroxybenzoic acid disodium salt 5-[4-[1-Hydroxy-3-(sodiosulfo)-7-amino-2-naphtylazo]biphenyl-4'-ylazo]salicylic acid sodium salt