| Vendor | Spec | Unit | Price | Currency | Date |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 350.16 | USD | 20250804 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 349.67 | USD | 20250801 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 419.6 | USD | 20250801 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 419.62 | USD | 20250731 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 419.93 | USD | 20250730 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 419.52 | USD | 20250729 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 419.77 | USD | 20250728 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 420.06 | USD | 20250725 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 420.09 | USD | 20250723 |
| Jiangsu SOPO Chemical Co., Ltd. | China national standards | MT | 419.45 | USD | 20250721 |