| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chem | China national standards | MT | 1046.88 | USD | 20251211 |
| Qingdao Shengze Chem | China national standards | MT | 1045.36 | USD | 20251128 |
| Qingdao Shengze Chem | China national standards | MT | 1044.81 | USD | 20251125 |
| Qingdao Shengze Chem | China national standards | MT | 1044.09 | USD | 20251122 |
| Qingdao Shengze Chem | China national standards | MT | 1044.83 | USD | 20251114 |
| Qingdao Shengze Chem | China national standards | MT | 1044.37 | USD | 20251110 |
| Qingdao Shengze Chem | China national standards | MT | 1044.37 | USD | 20251028 |