| Item | Specifications | Test methods |
| Combined acid% | 55.30±0.50 | GB/T32117-2015 Appendix A |
| Inherent viscosity dL/g | 1.60±0.10 | GB/T32117-2015 Appendix B |
| Moisture % | ≤ 2.0 | GB/T32117-2015 Appendix C |
| Blockage value g/m2 | ≥ 25 | GB/T32117-2015 Appendix D |
| Free acid % | ≤0.0050 | GB/T32117-2015 Appendix E |
| Ash ppm | 250±10 | |
| Color, b | ≤ 5.0 | GB/T32117-2015 Appendix G |
| Bulk density g/m³ | 0.17~0.30 | |
| Fe ppm | 2.0±0.5 | |
| Conclusion | The results conforms withenterprise standards | |