| Vendor | Spec | Unit | Price | Currency | Date |
| Nanjing Daoyi Chemical Technology Co., Ltd. | China national standards | MT | 239.84 | USD | 20251027 |
| Nanjing Daoyi Chemical Technology Co., Ltd. | China national standards | MT | 288.84 | USD | 20251020 |
| Nanjing Daoyi Chemical Technology Co., Ltd. | China national standards | MT | 239.37 | USD | 20251014 |
| Nanjing Daoyi Chemical Technology Co., Ltd. | China national standards | MT | 351.61 | USD | 20251009 |
| Nanjing Daoyi Chemical Technology Co., Ltd. | China national standards | MT | 295.55 | USD | 20250930 |
| Nanjing Daoyi Chemical Technology Co., Ltd. | China national standards | MT | 267.21 | USD | 20250922 |
| Nanjing Daoyi Chemical Technology Co., Ltd. | China national standards | MT | 351.69 | USD | 20250918 |