| Vendor | Spec | Unit | Price | Currency | Date |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 316.61 | USD | 20251206 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.33 | USD | 20251206 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 316.61 | USD | 20251205 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.33 | USD | 20251205 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.31 | USD | 20251203 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 316.59 | USD | 20251203 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 316.41 | USD | 20251202 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.12 | USD | 20251202 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.56 | USD | 20251130 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.15 | USD | 20251130 |