| Vendor | Spec | Unit | Price | Currency | Date |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.49 | USD | 20251021 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.7 | USD | 20251020 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.29 | USD | 20251020 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.81 | USD | 20251018 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.4 | USD | 20251018 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.81 | USD | 20251017 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.73 | USD | 20251016 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.32 | USD | 20251016 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.6 | USD | 20251015 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.19 | USD | 20251015 |