| Vendor | Spec | Unit | Price | Currency | Date |
| Shijiazhuang Baipo Chem | China national standards | MT | 320.33 | USD | 20251030 |
| Shijiazhuang Baipo Chem | China national standards | MT | 320.43 | USD | 20251029 |
| Shijiazhuang Baipo Chem | China national standards | MT | 320.37 | USD | 20251028 |
| Shijiazhuang Baipo Chem | China national standards | MT | 311.58 | USD | 20251024 |
| Shijiazhuang Baipo Chem | China national standards | MT | 308.81 | USD | 20251023 |
| Shijiazhuang Baipo Chem | China national standards | MT | 308.65 | USD | 20251022 |
| Shijiazhuang Baipo Chem | China national standards | MT | 308.76 | USD | 20251021 |
| Shijiazhuang Baipo Chem | China national standards | MT | 311.39 | USD | 20251020 |
| Shijiazhuang Baipo Chem | China national standards | MT | 311.49 | USD | 20251017 |
| Shijiazhuang Baipo Chem | China national standards | MT | 310.0 | USD | 20251016 |