| Vendor | Spec | Unit | Price | Currency | Date |
| Suzhou Chemical Material Co., Ltd. | China national standards | MT | 468.43 | USD | 20250929 |
| Suzhou Chemical Material Co., Ltd. | China national standards | MT | 482.71 | USD | 20250924 |
| Suzhou Chemical Material Co., Ltd. | China national standards | MT | 482.38 | USD | 20250922 |
| Suzhou Chemical Material Co., Ltd. | China national standards | MT | 482.23 | USD | 20250919 |
| Suzhou Chemical Material Co., Ltd. | China national standards | MT | 482.52 | USD | 20250918 |