| Vendor | Spec | Unit | Price | Currency | Date |
| Nanjing Waien Chemical Technology Co., Ltd. | China national standards | MT | 984.45 | USD | 20250922 |
| Nanjing Waien Chemical Technology Co., Ltd. | China national standards | MT | 984.14 | USD | 20250919 |
| Nanjing Waien Chemical Technology Co., Ltd. | China national standards | MT | 1294.23 | USD | 20250918 |
| Nanjing Waien Chemical Technology Co., Ltd. | China national standards | MT | 970.67 | USD | 20250918 |