| Vendor | Spec | Unit | Price | Currency | Date |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 748.97 | USD | 20251208 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 749.3 | USD | 20251204 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 749.02 | USD | 20251201 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 748.7 | USD | 20251128 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 748.63 | USD | 20251126 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 748.31 | USD | 20251125 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 748.09 | USD | 20251124 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 747.8 | USD | 20251121 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 748.42 | USD | 20251117 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 747.9 | USD | 20251113 |