10134-35-7 1H-Indol-3-ol, 5-bromo-2-(9-chloro-3-(sulfooxy)naphtho(1,2-b)thien-2-yl)-, hydrogen sulfate (ester), disodium salt Disodium 5-bromo-2-(9-chloro-3-(sulphonatooxy)naphtho(1,2-b)thien-2-yl)-1H-indol-3-yl sulphate EINECS 233-375-6