| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1011.79 | USD | 20250825 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1011.79 | USD | 20250825 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1016.53 | USD | 20250823 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1016.53 | USD | 20250822 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1016.53 | USD | 20250822 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1017.02 | USD | 20250821 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1017.02 | USD | 20250821 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1015.63 | USD | 20250820 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1015.99 | USD | 20250819 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1015.99 | USD | 20250819 |