| Vendor | Spec | Unit | Price | Currency | Date |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.91 | USD | 20251026 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.5 | USD | 20251025 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.91 | USD | 20251025 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.5 | USD | 20251024 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.91 | USD | 20251024 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.55 | USD | 20251023 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.96 | USD | 20251023 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.79 | USD | 20251022 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.38 | USD | 20251022 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.49 | USD | 20251021 |