| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 966.26 | USD | 20250806 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 966.85 | USD | 20250805 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 966.45 | USD | 20250804 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 965.09 | USD | 20250803 |