| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Hongyang Chem | China national standards | MT | 537.59 | USD | 20251211 |
| Shandong Hongyang Chem | China national standards | MT | 537.08 | USD | 20251210 |
| Shandong Hongyang Chem | China national standards | MT | 536.93 | USD | 20251209 |
| Shandong Hongyang Chem | China national standards | MT | 537.0 | USD | 20251208 |
| Shandong Hongyang Chem | China national standards | MT | 537.11 | USD | 20251205 |
| Shandong Hongyang Chem | China national standards | MT | 537.23 | USD | 20251204 |
| Shandong Hongyang Chem | China national standards | MT | 537.07 | USD | 20251203 |
| Shandong Hongyang Chem | China national standards | MT | 536.77 | USD | 20251202 |
| Shandong Hongyang Chem | China national standards | MT | 537.03 | USD | 20251201 |
| Shandong Hongyang Chem | China national standards | MT | 536.81 | USD | 20251128 |