| TEST | LIMIT |
| Total color, percent by mass. (Min) | 82.0 |
| Sum of volatile matter at 135 °C (275 °F) and chlorides and sulfates (calculated as sodium salts), percent by mass. (Max) | 18.0 |
| Water-insoluble matter, percent by mass. (Max) | 0.30 |
| 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid, disodium salt, percent by mass. (Max) | 0.30 |
| 4,5-Dihydroxy-3-(phenylazo)-2,7-naphthalenedisulfonic acid, disodium salt, percent by mass. (Max) | 3.00 |
| Aniline, parts per million (Max) | 25.0 |
| 4-Aminoazobenzene, parts per billion (Max) | 100.0 |
| 1,3-Diphenyltriazene, parts per billion (Max) | 125.0 |
| 4-Aminobiphenyl, parts per billion (Max) | 275.0 |
| Azobenzene, parts per million (Max) | 1.00 |
| Benzidine, parts per billion (Max) | 20.0 |
| Lead (as Pb) parts per million (Max) | 20.0 |
| Arsenic (as As), parts per million (Max) | 3.00 |
| Mercury (as Hg), parts per million (Max) | 1.00 |
