| Vendor | Spec | Unit | Price | Currency | Date |
| Dongying Huatai Chem | China national standards | MT | 240.79 | USD | 20260107 |
| Dongying Huatai Chem | China national standards | MT | 234.75 | USD | 20251231 |
| Dongying Huatai Chem | China national standards | MT | 234.75 | USD | 20251231 |
| Dongying Huatai Chem | China national standards | MT | 238.78 | USD | 20251226 |
| Dongying Huatai Chem | China national standards | MT | 238.78 | USD | 20251226 |
| Dongying Huatai Chem | China national standards | MT | 237.24 | USD | 20251225 |