| Vendor | Spec | Unit | Price | Currency | Date |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 337.69 | USD | 20250901 |
| Chizhou Xinyu Chemical Technology Co., Ltd. | China national standards | MT | 365.83 | USD | 20250901 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 393.97 | USD | 20250901 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 386.93 | USD | 20250901 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 365.83 | USD | 20250901 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 337.89 | USD | 20250830 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 337.89 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 366.04 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 351.96 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 387.16 | USD | 20250829 |