| Vendor | Spec | Unit | Price | Currency | Date |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 336.27 | USD | 20250816 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 336.27 | USD | 20250815 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 336.43 | USD | 20250814 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 336.37 | USD | 20250813 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 336.05 | USD | 20250812 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 336.11 | USD | 20250811 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 336.22 | USD | 20250808 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 336.39 | USD | 20250807 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 336.09 | USD | 20250806 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 336.29 | USD | 20250805 |