| TEST | LIMIT |
| Total color, percent by mass. (Min) | 85.0 |
| Sum of volatile matter at 135 °C (275 °F) and chlorides and sulfates (calculated as sodium salts), percent by mass (Max) | 15.0 |
| Matter insoluble in both water and chloroform, percent by mass (Max) | 0.20 |
| Total sulfonated quinaldines, sodium salts, percent by mass (Max) | 0.20 |
| Total sulfonated phthalic acids, sodium salts, percent by mass (Max) | 0.20 |
| 2-(2-Quinolinyl)-1H-indene-1,3 (2H)-dione, parts per million (Max) | 4.00 |
| Sum of sodium salts of the monosulfonates of 2-(2-quinolinyl)-1H-indene-1,3 (2H)-dione, percent by mass. (Min) | 75.0 |
| Sum of sodium salts of the disulfonates of 2-(2-quinolinyl)-1H-indene-1,3 (2H)-dione, percent by mass (Max) | 15.0 |
| 2-(2,3-Dihydro-1,3-dioxo-1H-indene-2-yl)-6, 8-quinolinedisulfonic acid, disodium salt, percent by mass (Max) | 3.00 |
| Diethyl ether soluble matter other than that specified, parts per million (Max), using added 2-(2-quinolinyl)-1H-indene-1,3 (2H)-dione for calibration. | 2.00 |
| 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 |
