| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 283.08 | USD | 20250819 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 283.08 | USD | 20250819 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 294.44 | USD | 20250818 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 294.44 | USD | 20250818 |