1H-Indol-3-ol,5-bromo-2-(9-chloro-3-(sulfooxy)naphtho(1,2-B)thien-2-yl)-,hydrogen sulfate (ester),disodium salt, 5-Bromo-2-[9-chloro-3-(sodiosulfooxy)naphtho[1,2-b]thiophen-2-yl]-1H-indol-3-ol (sulfuric acid sodium) salt, 1H-Indol-3-ol,5-bromo-2-(9-chloro-3-(sulfooxy)naphtho(1,2-B)thien-2-yl)-,3-(hydrogen sulfate),sodium salt (1:2), Solasol Grey BLS, Anthrasol Grey IBL, C.I.Solubilised Vat Black 1, Solubilised Vat Black 1, Einecs 233-375-6