| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Hongyang Chem | China national standards | MT | 4937.57 | USD | 20251104 |
| Shandong Zhiheng | China national standards | MT | 4937.57 | USD | 20251104 |
| Weifang Longmao Chem | Industrial Grade | MT | 4374.39 | USD | 20251103 |
| Shouguang ZixuChem | Industrial Grade | MT | 4374.39 | USD | 20251103 |
| Shandong Hongyang Chem | China national standards | MT | 4938.83 | USD | 20251103 |
| Shandong Zhiheng | China national standards | MT | 4938.83 | USD | 20251103 |
| Shandong Zhiheng | China national standards | MT | 4937.92 | USD | 20251031 |
| Weifang Sutong Chem | China national standards | MT | 4444.13 | USD | 20251031 |
| Shandong Hongyang Chem | China national standards | MT | 4937.92 | USD | 20251031 |
| Weifang Yahua Chem | Industrial Grade | MT | 4373.59 | USD | 20251031 |