| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 352.75 | USD | 20251119 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 395.08 | USD | 20251119 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 388.02 | USD | 20251119 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 395.17 | USD | 20251118 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 366.94 | USD | 20251118 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 352.83 | USD | 20251118 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 388.11 | USD | 20251118 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 367.15 | USD | 20251117 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 353.03 | USD | 20251117 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 395.39 | USD | 20251117 |