| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1401.64 | USD | 20250807 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1400.38 | USD | 20250806 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1400.38 | USD | 20250806 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1401.23 | USD | 20250805 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1401.23 | USD | 20250805 |