| Vendor | Spec | Unit | Price | Currency | Date |
| Jinan Kunfeng Chemical Co., Ltd. | China national standards | MT | 274.24 | USD | 20250922 |
| Jinan Kunfeng Chemical Co., Ltd. | China national standards | MT | 281.27 | USD | 20250922 |
| Jinan Kunfeng Chemical Co., Ltd. | China national standards | MT | 330.39 | USD | 20250921 |
| Jinan Kunfeng Chemical Co., Ltd. | China national standards | MT | 274.15 | USD | 20250919 |
| Jinan Kunfeng Chemical Co., Ltd. | China national standards | MT | 281.18 | USD | 20250919 |
| Jinan Kunfeng Chemical Co., Ltd. | China national standards | MT | 274.32 | USD | 20250918 |
| Jinan Kunfeng Chemical Co., Ltd. | China national standards | MT | 281.35 | USD | 20250918 |