| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1177.77 | USD | 20250823 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1166.56 | USD | 20250823 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1166.56 | USD | 20250823 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1166.56 | USD | 20250822 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1177.77 | USD | 20250822 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1166.56 | USD | 20250822 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1166.56 | USD | 20250822 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1163.75 | USD | 20250822 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1164.31 | USD | 20250821 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1178.34 | USD | 20250821 |