| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1164.97 | USD | 20250812 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1240.58 | USD | 20250812 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1240.81 | USD | 20250811 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1165.18 | USD | 20250811 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1165.56 | USD | 20250809 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1241.21 | USD | 20250809 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1165.56 | USD | 20250808 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1241.21 | USD | 20250808 |