| Vendor | Spec | Unit | Price | Currency | Date |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 341.99 | USD | 20251004 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.32 | USD | 20251004 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.32 | USD | 20250930 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 341.83 | USD | 20250929 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.16 | USD | 20250929 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 341.52 | USD | 20250928 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.87 | USD | 20250927 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 341.52 | USD | 20250927 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 341.52 | USD | 20250926 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.87 | USD | 20250926 |