| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1175.99 | USD | 20251205 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1252.31 | USD | 20251205 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1252.6 | USD | 20251204 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1176.25 | USD | 20251204 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1252.23 | USD | 20251203 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1175.91 | USD | 20251203 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1175.24 | USD | 20251202 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1251.52 | USD | 20251202 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1252.14 | USD | 20251201 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1175.82 | USD | 20251201 |