| Vendor | Spec | Unit | Price | Currency | Date |
| Shanxi Yangmei Chem | China national standards | MT | 522.1 | USD | 20251103 |
| Shanxi Yangmei Chem | China national standards | MT | 522.01 | USD | 20251101 |
| Shanxi Yangmei Chem | China national standards | MT | 613.38 | USD | 20251023 |
| Shanxi Yangmei Chem | China national standards | MT | 612.49 | USD | 20251014 |
| Shanxi Yangmei Chem | China national standards | MT | 576.74 | USD | 20250929 |
| Shanxi Yangmei Chem | China national standards | MT | 576.23 | USD | 20250928 |
| Shanxi Yangmei Chem | China national standards | MT | 577.0 | USD | 20250925 |