| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 239.45 | USD | 20251015 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 239.37 | USD | 20251014 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 239.41 | USD | 20251013 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 235.05 | USD | 20251012 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 235.05 | USD | 20251011 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 236.46 | USD | 20251010 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 246.13 | USD | 20251009 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 256.14 | USD | 20251008 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 256.14 | USD | 20251004 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 256.14 | USD | 20250930 |