| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Mengkangda Chemical Co., Ltd. | China national standards | MT | 759.61 | USD | 20250902 |
| Shandong Mengkangda Chemical Co., Ltd. | China national standards | MT | 759.89 | USD | 20250828 |
| Shandong Mengkangda Chemical Co., Ltd. | China national standards | MT | 759.41 | USD | 20250827 |
| Shandong Mengkangda Chemical Co., Ltd. | China national standards | MT | 758.55 | USD | 20250826 |
| Shandong Mengkangda Chemical Co., Ltd. | China national standards | MT | 758.84 | USD | 20250825 |