| Vendor | Spec | Unit | Price | Currency | Date |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.56 | USD | 20251129 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.15 | USD | 20251129 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.15 | USD | 20251128 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.19 | USD | 20251127 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.61 | USD | 20251127 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.11 | USD | 20251126 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.53 | USD | 20251126 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.39 | USD | 20251125 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.98 | USD | 20251125 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.29 | USD | 20251124 |