| Vendor | Spec | Unit | Price | Currency | Date |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 337.31 | USD | 20250927 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 365.41 | USD | 20250927 |
| China national standards | MT | 365.41 | USD | 20250927 | |
| Shandong Shuojia Chemical Co., Ltd. | China national standards | MT | 365.41 | USD | 20250927 |
| Shandong Shuojia Chemical Co., Ltd. | China national standards | MT | 365.41 | USD | 20250927 |
| Shanghai Huayi Holding Group Co., Ltd. | China national standards | MT | 421.63 | USD | 20250927 |
| Henan Longyu Coal Chemical Co., Ltd. | China national standards | MT | 344.33 | USD | 20250927 |
| Shandong Zhenkun New Materials Co., Ltd. | China national standards | MT | 393.52 | USD | 20250926 |
| China national standards | MT | 421.63 | USD | 20250926 | |
| Shandong Zhenkun New Materials Co., Ltd. | China national standards | MT | 421.63 | USD | 20250926 |