| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1139.11 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1054.73 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1053.55 | USD | 20250826 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1137.83 | USD | 20250826 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1138.26 | USD | 20250825 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1053.95 | USD | 20250825 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1051.58 | USD | 20250823 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1135.71 | USD | 20250823 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1135.71 | USD | 20250822 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1051.58 | USD | 20250822 |