| Vendor | Spec | Unit | Price | Currency | Date |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.79 | USD | 20251106 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.63 | USD | 20251105 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.04 | USD | 20251105 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.7 | USD | 20251104 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.11 | USD | 20251104 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.78 | USD | 20251103 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.2 | USD | 20251103 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.14 | USD | 20251102 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.72 | USD | 20251102 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 330.14 | USD | 20251101 |