| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1172.5 | USD | 20251129 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1175.32 | USD | 20251129 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1175.32 | USD | 20251128 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1172.5 | USD | 20251128 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1175.32 | USD | 20251128 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1175.32 | USD | 20251128 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1175.32 | USD | 20251128 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1186.63 | USD | 20251128 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1175.49 | USD | 20251127 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1175.49 | USD | 20251127 |