| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 508.07 | USD | 20251118 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 508.36 | USD | 20251117 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 628.39 | USD | 20251117 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 508.3 | USD | 20251115 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 628.31 | USD | 20251115 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 628.31 | USD | 20251114 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 508.3 | USD | 20251114 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 508.01 | USD | 20251113 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 627.95 | USD | 20251113 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 628.24 | USD | 20251112 |