| Vendor | Spec | Unit | Price | Currency | Date |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.81 | USD | 20251017 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.32 | USD | 20251016 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.73 | USD | 20251016 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.19 | USD | 20251015 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.6 | USD | 20251015 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.07 | USD | 20251014 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.48 | USD | 20251014 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.14 | USD | 20251013 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.54 | USD | 20251013 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 327.95 | USD | 20251012 |