| Vendor | Spec | Unit | Price | Currency | Date |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.25 | USD | 20251028 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.84 | USD | 20251028 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.13 | USD | 20251027 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.72 | USD | 20251027 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.91 | USD | 20251026 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.5 | USD | 20251026 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.91 | USD | 20251025 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.5 | USD | 20251025 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.91 | USD | 20251024 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.5 | USD | 20251024 |