Direct Green 21:1

2,7-Naphthalenedisulfonic acid, 5-(benzoylamino)-3-[[2-ethoxy-6-sulfo-4-[(3-sulfo[1,1'-biphenyl]-4-yl)azo]-1-naphthalenyl]azo]-4-hydroxy-, tetrasodium salt 4,5-Dihydroxy-3-[[2-ethoxy-4-[(8-sodiosulfo-2-naphthalenyl)azo]-1-naphthalenyl]azo]naphthalene-1-sulfonic acid sodium salt DIRECT GREEN 12 Direct Green 105 4-Amino-5-hydroxy-3-[[4'-[(4-hydroxyphenyl)azo]-1,1'-biphenyl-4-yl]azo]-6-(1-naphtylazo)-2,7-naphthalenedisulfonic acid disodium salt

Direct Green 104 Benzoic acid, 5-[[4'-[[8-amino-7-[(2,5-disulfophenyl)azo]-1-hydroxy-5-sulfo-2-naphthalenyl]azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-2-hydroxy-, tetrasodium salt C.I. Direct green 21 Direct Green 103