| Vendor | Spec | Unit | Price | Currency | Date |
| 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 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 336.16 | USD | 20250804 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 335.68 | USD | 20250801 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 335.69 | USD | 20250731 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 335.94 | USD | 20250730 |