| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Huize Chemical Technology Co., Ltd. | China national standards | MT | 957.38 | USD | 20250916 |
| Shandong Huize Chemical Technology Co., Ltd. | China national standards | MT | 956.99 | USD | 20250915 |
| Shandong Huize Chemical Technology Co., Ltd. | China national standards | MT | 956.55 | USD | 20250902 |
| Shandong Huize Chemical Technology Co., Ltd. | China national standards | MT | 955.22 | USD | 20250826 |