PTA Specification:
| Sr. No. | Quality Parameters | Unit | Specification |
|---|---|---|---|
| 1 | Appearance | NA | White crystalline free-flowing powder |
| 2 | "b" color | NA | 0.2–1.1 |
| 3 | 4-Carboxobenzaldehyde (4-CBA) | ppm (w/w) | 25 (max) |
| 4 | p-toluic Acid + 4-Carboxobenzaldehyde (4-CBA) | ppm (w/w) | 190 (max) |
| 5 | Ash Content | ppm (w/w) | 6 (max) |
| 6 | Total heavy metals | ppm (w/w) | 3 (max) |
| 7 | Moisture Content | wt% | 0.2 (max) |
| 8 | Acid Value | mg KOH/gm | 675 ± 2 |