| Vendor | Spec | Unit | Price | Currency | Date |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 365.65 | USD | 20250922 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 365.54 | USD | 20250920 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 337.42 | USD | 20250920 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 365.54 | USD | 20250919 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 351.48 | USD | 20250919 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 337.42 | USD | 20250919 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 351.69 | USD | 20250918 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 337.62 | USD | 20250918 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 337.62 | USD | 20250918 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 337.9 | USD | 20250916 |