| Vendor | Spec | Unit | Price | Currency | Date |
| Shijiazhuang Baipo Chem | China national standards | MT | 307.06 | USD | 20251015 |
| Shijiazhuang Baipo Chem | China national standards | MT | 306.95 | USD | 20251014 |
| Shijiazhuang Baipo Chem | China national standards | MT | 311.24 | USD | 20251013 |
| Shijiazhuang Baipo Chem | China national standards | MT | 311.06 | USD | 20251011 |
| Shijiazhuang Baipo Chem | China national standards | MT | 318.09 | USD | 20251010 |
| Shijiazhuang Baipo Chem | China national standards | MT | 320.67 | USD | 20251009 |
| Shijiazhuang Baipo Chem | China national standards | MT | 308.21 | USD | 20250930 |
| Shijiazhuang Baipo Chem | China national standards | MT | 315.1 | USD | 20250929 |
| Shijiazhuang Baipo Chem | China national standards | MT | 321.85 | USD | 20250928 |