| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Longhui Chemical Co., Ltd. | China national standards | MT | 302.37 | USD | 20250922 |
| Shandong Longhui Chemical Co., Ltd. | China national standards | MT | 302.27 | USD | 20250920 |
| Shandong Longhui Chemical Co., Ltd. | China national standards | MT | 302.27 | USD | 20250919 |