| Vendor | Spec | Unit | Price | Currency | Date |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 253.14 | USD | 20250922 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 267.21 | USD | 20250922 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 281.27 | USD | 20250922 |