| Vendor | Spec | Unit | Price | Currency | Date |
| Weifang Sutong Chem | China national standards | MT | 3996.9 | USD | 20251002 |
| Shandong Hongyang Chem | China national standards | MT | 4925.76 | USD | 20250930 |
| Weifang Longmao Chem | Industrial Grade | MT | 3940.61 | USD | 20250930 |
| Shouguang ZixuChem | Industrial Grade | MT | 3940.61 | USD | 20250930 |
| Shandong Zhiheng | China national standards | MT | 4925.76 | USD | 20250930 |
| Weifang Longmao Chem | Industrial Grade | MT | 3938.72 | USD | 20250929 |
| Shouguang ZixuChem | Industrial Grade | MT | 3938.72 | USD | 20250929 |
| Shandong Hongyang Chem | China national standards | MT | 4919.05 | USD | 20250928 |
| Shandong Zhiheng | China national standards | MT | 4919.05 | USD | 20250928 |
| Unknown | China national standards | MT | 4020.0 | USD | 20210323 |