| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1284.0 | USD | 20251119 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1107.63 | USD | 20251119 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1284.29 | USD | 20251118 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1256.07 | USD | 20251118 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1079.65 | USD | 20251118 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1100.82 | USD | 20251118 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1100.82 | USD | 20251118 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1107.88 | USD | 20251118 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1256.78 | USD | 20251117 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1080.26 | USD | 20251117 |