| Test |
EEC (Limit) |
| Total colouring matters calculated as the sodium salt percent by mass |
Min. |
70 |
| 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. |
10 |
| Total organic compound other than colouring matters, percent by mass.
4-aminonaphthalene-1-sulfonic acid |
Max. |
0.70 |
| 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 |
