| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 449.51 | USD | 20250826 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 449.51 | USD | 20250826 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 449.51 | USD | 20250826 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1036.65 | USD | 20250820 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1037.01 | USD | 20250819 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1037.55 | USD | 20250818 |