| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 365.67 | USD | 20251009 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 394.06 | USD | 20250930 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 387.02 | USD | 20250930 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 351.84 | USD | 20250930 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 365.91 | USD | 20250930 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 365.74 | USD | 20250929 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 386.84 | USD | 20250929 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 393.87 | USD | 20250929 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 393.52 | USD | 20250928 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 386.5 | USD | 20250928 |