| Vendor | Spec | Unit | Price | Currency | Date |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 351.69 | USD | 20250918 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 351.98 | USD | 20250916 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 351.84 | USD | 20250915 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 352.07 | USD | 20250909 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 351.97 | USD | 20250908 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 351.97 | USD | 20250908 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 351.8 | USD | 20250905 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 351.85 | USD | 20250904 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 351.76 | USD | 20250901 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 351.96 | USD | 20250829 |