| Vendor | Spec | Unit | Price | Currency | Date |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.48 | USD | 20251014 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.07 | USD | 20251014 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.54 | USD | 20251013 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.14 | USD | 20251013 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 327.95 | USD | 20251012 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.35 | USD | 20251011 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 327.95 | USD | 20251011 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.35 | USD | 20251010 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 327.95 | USD | 20251010 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 327.7 | USD | 20251009 |