| Vendor | Spec | Unit | Price | Currency | Date |
| Xiangfen Longtengda Chemical Co., Ltd. | China national standards | MT | 848.07 | USD | 20251205 |
| Xiangfen Longtengda Chemical Co., Ltd. | China national standards | MT | 847.53 | USD | 20251202 |
| Xiangfen Longtengda Chemical Co., Ltd. | China national standards | MT | 847.95 | USD | 20251201 |
| Xiangfen Longtengda Chemical Co., Ltd. | China national standards | MT | 846.68 | USD | 20251106 |
| Xiangfen Longtengda Chemical Co., Ltd. | China national standards | MT | 846.25 | USD | 20251105 |
| Xiangfen Longtengda Chemical Co., Ltd. | China national standards | MT | 846.44 | USD | 20251104 |
| Xiangfen Longtengda Chemical Co., Ltd. | China national standards | MT | 846.66 | USD | 20251103 |
| Xiangfen Longtengda Chemical Co., Ltd. | China national standards | MT | 844.42 | USD | 20250930 |
| Xiangfen Longtengda Chemical Co., Ltd. | China national standards | MT | 844.01 | USD | 20250929 |
| Xiangfen Longtengda Chemical Co., Ltd. | China national standards | MT | 843.27 | USD | 20250928 |