Synonymssodium3-hydroxy-3'-oxo-1H,3'H-[2,2'-biindole]-5-sulfonate Close sodium3-hydroxy-3'-oxo-1H,3'H-[2,2'-biindole]-5-sulfonate Related products Indigo Carmine M.F. M.W. 420.38 2x22.99 CAT# AR-I01479 CAS# 860-22-0 Indigo Carmine Related Compound 1 M.F. M.W. 341.32 22.99 CAT# AR-I01480 CAS# 27414-69-3 Indigo Carmine Related Compound 2 M.F. M.W. 420.38 2x22.99 CAT# AR-I01481 CAS# 27414-68-2 N-Nitroso Indigo Carmine M.F. M.W. 449.36; 2(22.99) CAT# AR-I03057 CAS# NA