| Vendor | Spec | Unit | Price | Currency | Date |
| Wuhan Hengjiu Chemical Co., Ltd. | China national standards | MT | 886.0 | USD | 20250922 |
| Wuhan Hengjiu Chemical Co., Ltd. | China national standards | MT | 885.73 | USD | 20250920 |
| Wuhan Hengjiu Chemical Co., Ltd. | China national standards | MT | 886.26 | USD | 20250918 |