| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Huize Chem | China national standards | MT | 508.81 | USD | 20251210 |
| Shandong Huize Chem | China national standards | MT | 508.73 | USD | 20251208 |
| Shandong Huize Chem | China national standards | MT | 508.52 | USD | 20251202 |
| Shandong Huize Chem | China national standards | MT | 508.55 | USD | 20251128 |
| Shandong Huize Chem | China national standards | MT | 508.01 | USD | 20251113 |
| Shandong Huize Chem | China national standards | MT | 508.0 | USD | 20251111 |
| Shandong Huize Chem | China national standards | MT | 507.63 | USD | 20251023 |
| Shandong Huize Chem | China national standards | MT | 507.08 | USD | 20251015 |
| Shandong Huize Chem | China national standards | MT | 506.31 | USD | 20251009 |
| Shandong Huize Chem | China national standards | MT | 505.96 | USD | 20250926 |