| Vendor | Spec | Unit | Price | Currency | Date |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 351.32 | USD | 20250825 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 350.53 | USD | 20250822 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 350.22 | USD | 20250820 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 350.52 | USD | 20250818 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 350.28 | USD | 20250815 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 350.39 | USD | 20250813 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 350.05 | USD | 20250812 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 350.12 | USD | 20250811 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 350.23 | USD | 20250808 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 350.41 | USD | 20250807 |