| Vendor | Spec | Unit | Price | Currency | Date |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 316.61 | USD | 20251206 |
| Henan Longyu Coal Chemical Co., Ltd. | China national standards | MT | 303.89 | USD | 20251206 |
| Shandong Zhenkun New Materials Co., Ltd. | China national standards | MT | 424.03 | USD | 20251206 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 325.09 | USD | 20251206 |
| Henan Longyu Coal Chemical Co., Ltd. | China national standards | MT | 303.89 | USD | 20251206 |
| Hebei Pengfa Chemcal Co., Ltd. | China national standards | MT | 329.33 | USD | 20251206 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 325.09 | USD | 20251206 |
| Shandong Zhenkun New Materials Co., Ltd. | China national standards | MT | 395.77 | USD | 20251206 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 325.09 | USD | 20251206 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 353.36 | USD | 20251205 |