| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Hezhan Chem | Industrial Grade | MT | 332.14 | USD | 20251210 |
| Shandong Hezhan Chem | Food Grade | MT | 327.85 | USD | 20251208 |
| Shandong Hezhan Chem | China national standards | MT | 317.6 | USD | 20251029 |
| Shandong Hezhan Chem | China national standards | MT | 302.95 | USD | 20251016 |
| Shandong Hezhan Chem | China national standards | MT | 306.83 | USD | 20251011 |
| Shandong Hezhan Chem | Industrial Grade | MT | 302.57 | USD | 20250923 |
| Shandong Hezhan Chem | China national standards | MT | 294.29 | USD | 20250819 |