| Vendor | Spec | Unit | Price | Currency | Date |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 324.71 | USD | 20251112 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 352.94 | USD | 20251112 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 338.67 | USD | 20251111 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 324.56 | USD | 20251111 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 338.72 | USD | 20251110 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 324.6 | USD | 20251110 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 374.0 | USD | 20251110 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 338.81 | USD | 20251107 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 324.69 | USD | 20251107 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 374.1 | USD | 20251107 |