| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1165.94 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1241.61 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1242.25 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1166.54 | USD | 20250818 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1165.74 | USD | 20250815 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1241.4 | USD | 20250815 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1241.99 | USD | 20250814 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1166.3 | USD | 20250814 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1166.08 | USD | 20250813 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1241.77 | USD | 20250813 |