| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 826.67 | USD | 20250816 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 826.12 | USD | 20250812 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 826.27 | USD | 20250811 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 826.54 | USD | 20250808 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 826.97 | USD | 20250807 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 826.72 | USD | 20250805 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 825.22 | USD | 20250801 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 811.26 | USD | 20250731 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 811.86 | USD | 20250730 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 811.56 | USD | 20250728 |