| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 687.03 | USD | 20250823 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 687.03 | USD | 20250822 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 687.36 | USD | 20250821 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 687.36 | USD | 20250821 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 686.43 | USD | 20250820 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 686.67 | USD | 20250819 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 686.67 | USD | 20250819 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 687.03 | USD | 20250818 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 686.55 | USD | 20250817 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 686.55 | USD | 20250816 |