| Vendor | Spec | Unit | Price | Currency | Date |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 731.83 | USD | 20251008 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 689.61 | USD | 20251007 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 689.61 | USD | 20251005 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 689.61 | USD | 20251004 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 689.61 | USD | 20250930 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 731.83 | USD | 20250930 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 830.34 | USD | 20250930 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 829.95 | USD | 20250929 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 689.28 | USD | 20250929 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 731.48 | USD | 20250929 |