| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Zhiheng | China national standards | MT | 661.45 | USD | 20251216 |
| Wuhan Hengjiu Chem | China national standards | MT | 660.67 | USD | 20251211 |
| Shandong Zhiheng | China national standards | MT | 660.67 | USD | 20251211 |
| Shandong Zhiheng | China national standards | MT | 660.04 | USD | 20251210 |
| Wuhan Hengjiu Chem | China national standards | MT | 660.04 | USD | 20251210 |
| Binzhou Dayou Energy | China national standards | MT | 659.86 | USD | 20251209 |
| Shandong Zhiheng | China national standards | MT | 659.86 | USD | 20251209 |
| Binzhou Dayou Energy | China national standards | MT | 659.94 | USD | 20251208 |
| Shandong Zhiheng | China national standards | MT | 659.94 | USD | 20251208 |
| Binzhou Dayou Energy | China national standards | MT | 660.08 | USD | 20251205 |