| Vendor | Spec | Unit | Price | Currency | Date |
| Changzhou Pengwei Chemical Co., Ltd. | China national standards | MT | 325.05 | USD | 20251201 |
| Changzhou Pengwei Chemical Co., Ltd. | China national standards | MT | 307.71 | USD | 20251124 |
| Changzhou Pengwei Chemical Co., Ltd. | China national standards | MT | 307.67 | USD | 20251028 |
| Changzhou Pengwei Chemical Co., Ltd. | China national standards | MT | 307.4 | USD | 20251023 |
| Changzhou Pengwei Chemical Co., Ltd. | China national standards | MT | 307.01 | USD | 20251013 |