| Vendor | Spec | Unit | Price | Currency | Date |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 832.39 | USD | 20251101 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 774.55 | USD | 20251031 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 740.69 | USD | 20251031 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 712.47 | USD | 20251031 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 733.63 | USD | 20251031 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 705.42 | USD | 20251031 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 832.39 | USD | 20251031 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 712.63 | USD | 20251030 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 705.58 | USD | 20251030 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 832.58 | USD | 20251030 |