The molecule is the organosulfonate oxoanion that is the tetraanionic form of the azo dye remazole black-GR. It has a role as a dye. It is an organosulfonate oxoanion, a sulfone and a bis(azo) compound.
4-amino-5-hydroxy-3,6-bis[[4-(2-sulfonatooxyethylsulfonyl)phenyl]diazenyl]naphthalene-2,7-disulfonate