| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1206.39 | USD | 20250821 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1204.75 | USD | 20250820 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1204.75 | USD | 20250820 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1169.73 | USD | 20250820 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1190.74 | USD | 20250820 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1165.53 | USD | 20250820 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1205.17 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1165.94 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1191.16 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1170.14 | USD | 20250819 |