SMILES: COC1=CC=CC(=C1)N=NC2=C(C=C3C=C(C=CC3=C2O)NC(=O)NC4=CC5=CC(=C(C(=C5C=C4)O)N=NC6=CC7=C(C=C6)C=C(C=C7)S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+].[Na+]
Description: The molecule is an organic sodium salt that is the trisodium salt of 4-hydroxy-7-[({5-hydroxy-6-[(3-methoxyphenyl)diazenyl]-7-sulfonaphthalen-2-yl}carbamoyl)amino]-3-[(6-sulfonaphthalen-2-yl)diazenyl]naphthalene-2-sulfonic acid. A direct cotton dye that is also capable of hydrogen bonding to amyloid and giving a dark enough red colour to be useful in diagnostic histology. It has a role as a histological dye. It contains a benzo scarlet 4BNS(3-).