| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Hongyang Chemical Co., Ltd. | China national standards | MT | 1090.24 | USD | 20250918 |
| Shandong Hongyang Chemical Co., Ltd. | China national standards | MT | 1118.38 | USD | 20250918 |
| Shandong Hongyang Chemical Co., Ltd. | China national standards | MT | 1184.5 | USD | 20250918 |