Indigo carmine

Indigo carmine, or 5,5'-indigodisulfonic acid sodium salt, also known as indigotine or FD&C Blue #2, is a pH indicator with the chemical formula C₁₆H₈N₂Na₂O₈S₂. It is approved for use as a food colorant in the United States and in Europe. and has the E number E132.

单词	Indigo carmine
释义	Indigo carmine 英语百科 Indigo carmine Indigo carmine, or 5,5'-indigodisulfonic acid sodium salt, also known as indigotine or FD&C Blue #2, is a pH indicator with the chemical formula C₁₆H₈N₂Na₂O₈S₂. It is approved for use as a food colorant in the United States and in Europe. and has the E number E132.
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