| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Longhui Chemical Co., Ltd. | China national standards | MT | 1042.15 | USD | 20251013 |
| Shandong Longhui Chemical Co., Ltd. | China national standards | MT | 1042.15 | USD | 20251013 |
| Shandong Longhui Chemical Co., Ltd. | China national standards | MT | 1041.55 | USD | 20251011 |
| Shandong Longhui Chemical Co., Ltd. | China national standards | MT | 1027.47 | USD | 20251011 |
| Shandong Longhui Chemical Co., Ltd. | China national standards | MT | 1041.55 | USD | 20251010 |