| Vendor | Spec | Unit | Price | Currency | Date |
| Suzhou Chemical Material Co., Ltd. | China national standards | MT | 331.9 | USD | 20250922 |
| Suzhou Chemical Material Co., Ltd. | China national standards | MT | 331.8 | USD | 20250919 |
| Suzhou Chemical Material Co., Ltd. | China national standards | MT | 332.0 | USD | 20250918 |