| Vendor | Spec | Unit | Price | Currency | Date |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 522.86 | USD | 20251208 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 523.09 | USD | 20251204 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 522.9 | USD | 20251201 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 522.68 | USD | 20251128 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 522.63 | USD | 20251126 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 522.41 | USD | 20251125 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 522.25 | USD | 20251124 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 522.05 | USD | 20251121 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 522.48 | USD | 20251117 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 522.12 | USD | 20251113 |