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 |