4-amino-1,1'-azobenzene-3,4'-disulfonic acid
C.I. 13015; C.I. Acid Yellow 9; C.I. Food Yellow 2; C.I. Acid Yellow 9, disodium salt (8CI); 4-Amino-1,1-azobenzene-3,4-disulfonic acid sodium salt; disodium 4-aminoazobenzene-3,4-disulfonate; Food yellow; ACID YELLOW 147; disodium 2-amino-5-[(E)-(4-sulfonatophenyl)diazenyl]benzenesulfonate; benzenesulfonic acid, 2-amino-5-[(E)-(4-sulfophenyl)azo]-, monosodium salt; Acid Yellow 9