| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1016.52 | USD | 20250818 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1015.82 | USD | 20250817 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1050.85 | USD | 20250815 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1015.82 | USD | 20250815 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1051.35 | USD | 20250814 |