| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Zhihengda Import and Export Co., Ltd. | China national standards | MT | 656.77 | USD | 20250922 |
| Shandong Zhihengda Import and Export Co., Ltd. | China national standards | MT | 656.56 | USD | 20250919 |
| Shandong Zhihengda Import and Export Co., Ltd. | China national standards | MT | 656.96 | USD | 20250918 |
| Henan Argus Chemical Co., Ltd. | China national standards | MT | 739.05 | USD | 20250305 |