Indigo Carmine
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Country Of Origin : India
Indigo carmine, or 5,5′-indigodisulfonic acid sodium salt, is an organic salt derived from indigo by aromatic sulfonation, which renders the compound soluble in water. It is approved for use as a food colorant in the U.S and E.U. to produce a blue color. It has the E number E132. It is also a pH indicator.