| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1181.3 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1170.05 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1167.24 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1165.93 | USD | 20250826 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1179.97 | USD | 20250826 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1168.74 | USD | 20250826 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1168.74 | USD | 20250826 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1168.74 | USD | 20250826 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1169.18 | USD | 20250825 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1169.18 | USD | 20250825 |