| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Hongyang Chemical Co., Ltd. | China national standards | MT | 1089.92 | USD | 20250922 |
| Shandong Hongyang Chemical Co., Ltd. | China national standards | MT | 1089.58 | USD | 20250919 |
| Shandong Hongyang Chemical Co., Ltd. | China national standards | MT | 1090.24 | USD | 20250918 |