| Vendor | Spec | Unit | Price | Currency | Date |
| Shifang Yufeng Chem | China national standards | MT | 728.49 | USD | 20260422 |
| Shifang Yufeng Chem | China national standards | MT | USD | 20260408 | |
| Shifang Yufeng Chem | China national standards | MT | USD | 20260316 | |
| Shifang Yufeng Chem | China national standards | MT | USD | 20260106 | |
| Shifang Yufeng Chem | China national standards | MT | USD | 20251229 |