| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 351.48 | USD | 20250919 |
| Shandong Jinshengrun Chemical Co., Ltd. | China national standards | MT | 365.54 | USD | 20250919 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 328.98 | USD | 20250919 |
| Shandong Shuojia Chemical Co., Ltd. | China national standards | MT | 365.54 | USD | 20250919 |
| Shandong Shuojia Chemical Co., Ltd. | China national standards | MT | 337.42 | USD | 20250919 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 365.54 | USD | 20250919 |
| Hualu Holdings Group Co., Ltd. | China national standards | MT | 414.75 | USD | 20250919 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 351.69 | USD | 20250918 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 365.76 | USD | 20250918 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 365.76 | USD | 20250918 |