| Vendor | Spec | Unit | Price | Currency | Date |
| Weifang Yahua Chem | Industrial Grade | MT | 4658.19 | USD | 20251029 |
| Weifang Yahua Chem | Industrial Grade | MT | 4375.07 | USD | 20251028 |
| Weifang Yahua Chem | Industrial Grade | MT | 4230.24 | USD | 20251023 |
| Weifang Yahua Chem | Industrial Grade | MT | 4157.92 | USD | 20251017 |
| Weifang Yahua Chem | Industrial Grade | MT | 4083.3 | USD | 20251014 |