| Vendor | Spec | Unit | Price | Currency | Date |
| Jinan Dezheng Chemical Co., Ltd. | China national standards | MT | 541.45 | USD | 20250922 |
| Jinan Dezheng Chemical Co., Ltd. | China national standards | MT | 541.28 | USD | 20250920 |
| Jinan Dezheng Chemical Co., Ltd. | China national standards | MT | 541.28 | USD | 20250920 |
| Jinan Dezheng Chemical Co., Ltd. | China national standards | MT | 541.28 | USD | 20250920 |
| Jinan Dezheng Chemical Co., Ltd. | China national standards | MT | 541.28 | USD | 20250920 |
| Jinan Dezheng Chemical Co., Ltd. | China national standards | MT | 541.28 | USD | 20250919 |
| Jinan Dezheng Chemical Co., Ltd. | China national standards | MT | 541.61 | USD | 20250918 |