Indigo Carmine

color_indigo_carmine

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

Product CharacteristicsProduct Detail
Colour Index No.73015
Food Colour No.Blue 1
F.D. & C. No.Blue 2
CAS NO.860-22-0
E.E.C. No.E-132
I.S. No.1698
Total Dye Content Corrected for Sample (Min.)87%
Volatile Matter (chloride & sulphate) (Max)13%
Solubility In Water (20oc)120 gram / liter
Combined Ether Extract. (Max)0.20%
Water Insoluble (Max)0.20%
ClassTriarylmethane
Light Stability6
Heat Stability (100oc)5
Alkali Stability3
Subsidiary Dyes (MAX)1.00%
Dyes Intermediate (Max)1.00%
Lead< 10 ppm
Arsenic< 3 ppm
Mercury< 1 ppm
Heavy Metals< 20 ppm