| Vendor | Spec | Unit | Price | Currency | Date |
| Weifang Sutong Chem | China national standards | MT | 4418.84 | USD | 20251112 |
| Weifang Sutong Chem | China national standards | MT | 4402.68 | USD | 20251111 |
| Weifang Sutong Chem | China national standards | MT | 4390.42 | USD | 20251107 |
| Weifang Sutong Chem | China national standards | MT | 4374.51 | USD | 20251106 |
| Weifang Sutong Chem | China national standards | MT | 4428.71 | USD | 20251105 |
| Weifang Sutong Chem | China national standards | MT | 4444.13 | USD | 20251031 |
| Weifang Sutong Chem | China national standards | MT | 4416.91 | USD | 20251030 |
| Weifang Sutong Chem | China national standards | MT | 4445.64 | USD | 20251028 |
| Weifang Sutong Chem | China national standards | MT | 4370.63 | USD | 20251024 |
| Weifang Sutong Chem | China national standards | MT | 4371.25 | USD | 20251023 |