| Test | EEC (Limit) |
| 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 (calculated as aniline). | Max. | 0.01 |
| Subsidiary dyes, percent by mass. | Max. | 1 |
Total organic compound other than coloring matter, percent by mass.
4-hydrazinobenzene sulfonic acid
4-aminobenzene-1-sulfonic acid
5-oxo-1-(4-sulfophenyl)- 2-pyrazoline-3-carboxylic acid 4
4_-diazoaminodi(benzene sulfonic acid)
Tetrahydroxysuccinic 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 |
