| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 508.84 | USD | 20251205 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 628.98 | USD | 20251205 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 628.94 | USD | 20251203 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 508.81 | USD | 20251203 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 508.52 | USD | 20251202 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 628.58 | USD | 20251202 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 508.77 | USD | 20251201 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 628.9 | USD | 20251201 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 508.55 | USD | 20251129 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 628.63 | USD | 20251129 |