| Product Name | Indigo Carmine |
|---|---|
| Colour Shade | |
| Synonyms | Acid Blue 74 |
| Chemical Name | Disodium 3,3′-dioxo-2,2′-bi-indolylidene-5,5′-disulphonate |
| C.I. No | 73015 |
| C.I. Name | Food Blue 1 |
| FDA Status | FD & C Blue #2 |
| CAS No. | 860-22-0 |
| EINECS No. | 212-728-8 |
| E. NUMBER | E - 132 |
| Total colouring matters calculated as the sodium salt percent by mass | Min. | 85 |
|---|---|---|
| Water insoluble matter, percent by mass | Max. | 0.20 |
| Combined ether extract, percent by mass | Max. | 0.20 |
| Unsulfonated Primary Aromatic amines. percent by mass | Max. | 0.01 |
| Subsidiary dyes, percent by mass | Max. | 1 |
| Total organic compound other than colouring matters, percent by mass Isatin-5-sulfonic acid, 5-sulfoanthranilic acid Anthranilic acid |
Max. | 0.50 |
| Heavy metals as pb(mg/kg.) | Max. | 40 |
| Arsenic, (mg/kg.) | Max. | 3 |
| Lead (mg/kg.) | Max. | 2 |
| Mercury (mg/kg.) | Max. | 1 |
| Cadmium (mg/kg.) | Max. | 1 |