| Vendor | Spec | Unit | Price | Currency | Date |
| Guangzhou Longyu Chemical Co., Ltd. | China national standards | MT | 1336.03 | USD | 20250922 |
| Guangzhou Longyu Chemical Co., Ltd. | China national standards | MT | 1335.62 | USD | 20250919 |
| Guangzhou Longyu Chemical Co., Ltd. | China national standards | MT | 1336.43 | USD | 20250918 |