| Vendor | Spec | Unit | Price | Currency | Date |
| Nanjing Baitu Chemicals Co., Ltd. | China national standards | MT | 1175.8 | USD | 20250730 |
| Nanjing Baitu Chemicals Co., Ltd. | China national standards | MT | 1174.64 | USD | 20250729 |
| Nanjing Baitu Chemicals Co., Ltd. | China national standards | MT | 1174.64 | USD | 20250729 |
| Nanjing Baitu Chemicals Co., Ltd. | China national standards | MT | 1175.37 | USD | 20250728 |
| Nanjing Baitu Chemicals Co., Ltd. | China national standards | MT | 1175.37 | USD | 20250728 |