| Vendor | Spec | Unit | Price | Currency | Date |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.29 | USD | 20251124 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.75 | USD | 20251123 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.75 | USD | 20251122 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.75 | USD | 20251121 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.17 | USD | 20251119 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.76 | USD | 20251119 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.25 | USD | 20251118 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.84 | USD | 20251118 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.02 | USD | 20251117 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.43 | USD | 20251117 |