Menu
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 Characteristics | Product 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% |
| Class | Triarylmethane |
| Light Stability | 6 |
| Heat Stability (100oc) | 5 |
| Alkali Stability | 3 |
| Subsidiary Dyes (MAX) | 1.00% |
| Dyes Intermediate (Max) | 1.00% |
| Lead | < 10 ppm |
| Arsenic | < 3 ppm |
| Mercury | < 1 ppm |
| Heavy Metals | < 20 ppm |