Synonyms: Indigowhite (6CI); [2,2'-Bi-1H-indole]-3,3'-diol, disodium salt (9CI);[2,2'-Biindole]-3,3'-diol, disodium salt (8CI); C.I. 73001; C.I. Reduced VatBlue 1; Indigo Grains; Indigo MLB Vat; Indigo NAC Grains; Indigo NAC White;Indigo Vat BASF; Indigo Vat Grains; Indigo Vat I; Indigo Vat II; Mitsui IndigoVat Grain; Mitsui Indigo White; Reduced Indigo Solution C; Reduced IndigoSolution L; Reduced Synthetic Indigo Grains; Reduced Vat Blue 1; Sodium,[[2,2'-bi-1H-indole]-3,3'-diylbis(oxy)]bis-