| Vendor | Spec | Unit | Price | Currency | Date |
| Changzhou Qinghong Chemical Co., Ltd. | China national standards | MT | 91.43 | USD | 20250929 |
| Changzhou Qinghong Chemical Co., Ltd. | China national standards | MT | 91.35 | USD | 20250928 |
| Changzhou Qinghong Chemical Co., Ltd. | China national standards | MT | 91.35 | USD | 20250928 |