| Vendor | Spec | Unit | Price | Currency | Date |
| Suzhou Zhaohua Chemical Co., Ltd. | China national standards | MT | 281.35 | USD | 20250918 |
| Suzhou Zhaohua Chemical Co., Ltd. | China national standards | MT | 281.48 | USD | 20250904 |
| Suzhou Zhaohua Chemical Co., Ltd. | China national standards | MT | 281.4 | USD | 20250901 |
| Suzhou Zhaohua Chemical Co., Ltd. | China national standards | MT | 281.05 | USD | 20250825 |
| Suzhou Zhaohua Chemical Co., Ltd. | China national standards | MT | 280.17 | USD | 20250820 |