| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 384.79 | USD | 20250728 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 391.79 | USD | 20250728 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 392.05 | USD | 20250726 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 385.05 | USD | 20250726 |
| 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 | 385.05 | USD | 20250725 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 392.05 | USD | 20250725 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 392.24 | USD | 20250724 |