| SYNONYMS | FAST RED E |
| DEFINITION | Fast Red E consists essentially of disodium 2 - hydroxy-1 (4--sulfonato-naphthylazo)naphthalene-6-sulfonate subsidary colouring matters together with sodium sulfate as the principal uncoloured components. |
| Fast Red E is described as the sodium salt. The calcium and the potassium salt are also permitted. | |
| CLASS | - |
| COLOUR INDEX NO. |
16045 |
| EEC NUMBER | - |
| EINECS | - |
| CHEMICAL NAMES | Disodium 2- hydroxy-1(4-sulfonato-naphthylazo)naphthalene-6-sulfonate |
| CHEMICAL FORMULA | - |
| MOLECULAR WEIGHT | - |
| ASSAY | Content not less than 85% total colouring matters, calculated as the sodium salt |
| DESCRIPTION | Red powder |
| PURITY | Not more than 0.2% |
| Water Insoluble matter | |
| Subsidiary colouring matters | Not more than 2% |
| Unsulfonated primary aromatic amines | Not more than 0.01% (Calculated as aniline) |
| Ether extractable matter | Not more than 0.2% under neutral conditions |
| Arsenic | Not more than 3 mg/kg. |
| Lead | Not more than 10 mg/kg. |
| Mercury | Not more than 1 mg/kg. |
| Cadmium | Not more than 1 mg/kg. |
| Heavy metals | Not more than 40 mg/kg. |
| (as Pb) |
