| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1009.52 | USD | 20250822 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1010.0 | USD | 20250821 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1008.63 | USD | 20250820 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1008.98 | USD | 20250819 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1009.51 | USD | 20250818 |