| Vendor | Spec | Unit | Price | Currency | Date |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.79 | USD | 20251111 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.84 | USD | 20251110 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.25 | USD | 20251110 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.93 | USD | 20251109 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.34 | USD | 20251109 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.34 | USD | 20251108 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.93 | USD | 20251108 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.93 | USD | 20251107 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.34 | USD | 20251107 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.21 | USD | 20251106 |