| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 363.8 | USD | 20250728 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 349.81 | USD | 20250728 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 364.05 | USD | 20250726 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 364.05 | USD | 20250725 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 350.05 | USD | 20250725 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 350.21 | USD | 20250724 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 364.22 | USD | 20250724 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 364.07 | USD | 20250723 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 350.07 | USD | 20250723 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 363.84 | USD | 20250722 |