| Vendor | Spec | Unit | Price | Currency | Date |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 369.71 | USD | 20251103 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 338.66 | USD | 20251103 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 338.66 | USD | 20251103 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 324.55 | USD | 20251103 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 369.64 | USD | 20251101 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 369.64 | USD | 20251031 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 373.87 | USD | 20251031 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 338.6 | USD | 20251031 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 369.72 | USD | 20251030 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 373.96 | USD | 20251030 |