| Vendor | Spec | Unit | Price | Currency | Date |
| Heze Jiangyuan Chemical Co., Ltd. | China national standards | MT | 85.79 | USD | 20251009 |
| Heze Jiangyuan Chemical Co., Ltd. | China national standards | MT | 85.85 | USD | 20250930 |
| Heze Jiangyuan Chemical Co., Ltd. | China national standards | MT | 85.81 | USD | 20250929 |
| Heze Jiangyuan Chemical Co., Ltd. | China national standards | MT | 85.73 | USD | 20250928 |