| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1247.37 | USD | 20251129 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1247.37 | USD | 20251128 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1247.55 | USD | 20251127 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1247.25 | USD | 20251126 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1246.72 | USD | 20251125 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1246.35 | USD | 20251124 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1245.86 | USD | 20251121 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1245.33 | USD | 20251120 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1245.91 | USD | 20251119 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1246.19 | USD | 20251118 |