| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 395.22 | USD | 20251124 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 395.06 | USD | 20251121 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 352.73 | USD | 20251121 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 388.01 | USD | 20251121 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 366.84 | USD | 20251121 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 352.58 | USD | 20251120 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 387.84 | USD | 20251120 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 394.89 | USD | 20251120 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 366.69 | USD | 20251120 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 352.75 | USD | 20251119 |