| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Ruishuang Chemical Co., Ltd. | China national standards | MT | 422.2 | USD | 20250924 |
| Qingdao Ruishuang Chemical Co., Ltd. | China national standards | MT | 422.2 | USD | 20250923 |
| Qingdao Ruishuang Chemical Co., Ltd. | China national standards | MT | 421.91 | USD | 20250922 |
| Qingdao Ruishuang Chemical Co., Ltd. | China national standards | MT | 421.77 | USD | 20250919 |
| Qingdao Ruishuang Chemical Co., Ltd. | China national standards | MT | 422.03 | USD | 20250918 |