| Vendor | Spec | Unit | Price | Currency | Date |
| Jinan Jinhao Chemical Co., Ltd. | China national standards | MT | 1225.23 | USD | 20251013 |
| Jinan Jinhao Chemical Co., Ltd. | China national standards | MT | 1224.52 | USD | 20251011 |
| Jinan Jinhao Chemical Co., Ltd. | China national standards | MT | 1223.53 | USD | 20250922 |
| Jinan Jinhao Chemical Co., Ltd. | China national standards | MT | 1223.89 | USD | 20250918 |