| Vendor | Spec | Unit | Price | Currency | Date |
| Dongying Qirun Chem | China national standards | MT | 133.47 | USD | 20260130 |
| Dongying Qirun Chem | China national standards | MT | 115.41 | USD | 20260107 |
| Dongying Qirun Chem | China national standards | MT | 115.41 | USD | 20260107 |
| Dongying Qirun Chem | China national standards | MT | 119.44 | USD | 20251229 |
| Dongying Qirun Chem | China national standards | MT | 119.44 | USD | 20251229 |
| Dongying Qirun Chem | China national standards | MT | 129.34 | USD | 20251226 |
| Dongying Qirun Chem | China national standards | MT | 129.34 | USD | 20251226 |