| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 350.28 | USD | 20250817 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 350.28 | USD | 20250816 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 350.28 | USD | 20250816 |