| Vendor | Spec | Unit | Price | Currency | Date |
| Jinan Dezheng Chemical Co., Ltd. | China national standards | MT | 256.14 | USD | 20251008 |
| Jinan Dezheng Chemical Co., Ltd. | China national standards | MT | 256.14 | USD | 20251007 |
| Jinan Dezheng Chemical Co., Ltd. | China national standards | MT | 256.14 | USD | 20251005 |
| Jinan Dezheng Chemical Co., Ltd. | China national standards | MT | 256.14 | USD | 20251004 |
| Jinan Dezheng Chemical Co., Ltd. | China national standards | MT | 256.14 | USD | 20250930 |
| Jinan Dezheng Chemical Co., Ltd. | China national standards | MT | 256.02 | USD | 20250929 |
| Jinan Dezheng Chemical Co., Ltd. | China national standards | MT | 255.79 | USD | 20250927 |
| Jinan Dezheng Chemical Co., Ltd. | China national standards | MT | 255.79 | USD | 20250926 |
| Jinan Dezheng Chemical Co., Ltd. | China national standards | MT | 256.13 | USD | 20250925 |
| Jinan Dezheng Chemical Co., Ltd. | China national standards | MT | 256.13 | USD | 20250924 |