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Synonyms: Acid Blue 74, Indigo-5,5'-disulfonic acid disodium salt, Indigocarmine
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.
I 1275 (OTTO) Indigo carmine, GR Cas 860-22-0 - used as a pH indicator, often in a 0.2% aqueous solution. It is blue at pH 11.4 and yellow at 13.0. Indigo carmine is also a redox indicator, turning yellow upon reduction.
azard Codes Xn
Certificate Of Analysis
(For eg. B 1615-0108)
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Methyl orange, ACS reagent, dye content 85%
4477-79-6
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633-96-5
Acid orange II
58880-05-0
Ethidium bromide monoazide, ≥95% (HPLC)
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