| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Shuntian Chem | China national standards | MT | 306.95 | USD | 20251014 |
| Shandong Shuntian Chem | China national standards | MT | 307.01 | USD | 20251013 |
| Shandong Shuntian Chem | China national standards | MT | 309.65 | USD | 20251011 |
| Shandong Shuntian Chem | China national standards | MT | 309.65 | USD | 20251010 |
| Shandong Shuntian Chem | China national standards | MT | 309.41 | USD | 20251009 |
| Shandong Shuntian Chem | China national standards | MT | 309.62 | USD | 20250930 |
| Shandong Shuntian Chem | China national standards | MT | 309.47 | USD | 20250929 |
| Shandong Shuntian Chem | China national standards | MT | 316.22 | USD | 20250928 |