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CAS Number: 860-22-0
Molecular Formula: C16H8N2Na2O8S2
Molecular Weight: 466.3
IUPAC Name: 3,3'-dioxo-2,2'-bis-indolyden-5,5'-disulfonic acid disodium salt
Other Names: Acid Blue 74, Indigo-5,5′-disulfonic acid disodium salt, Indigocarmine, Indigotine.