Complaint
| Item | Unit | Index | Test method | |
| Intrinsic Viscosity (Foreign Trade) | dL/g | 0.820±0.02 | ASTM D4603 | |
| Content of ace-taldehyde | ppm | ≤1 | Gas chromatography | |
| Color value | L | / | ≥82 | HunterLab |
| b | / | ≤1 | HunterLab | |
| Carboxyl end group | mmol/kg | ≤30 | Photometric titration | |
| Melting point | ºC | 243±2 | DSC | |
| Water content | wt% | ≤0.2 | Weight method | |
| Powder dust | ppm | ≤100 | Weight method | |
| Wt. of 100 chips | g | 1.55±0.10 | Weight method | |
