| Vendor | Spec | Unit | Price | Currency | Date |
| Binzhou Shengyuan Chemical Technology Co., Ltd. | China national standards | MT | 211.55 | USD | 20251120 |
| Binzhou Shengyuan Chemical Technology Co., Ltd. | China national standards | MT | 211.7 | USD | 20251118 |
| Binzhou Shengyuan Chemical Technology Co., Ltd. | China national standards | MT | 211.67 | USD | 20251106 |
| Binzhou Shengyuan Chemical Technology Co., Ltd. | China national standards | MT | 211.61 | USD | 20251104 |
| Binzhou Shengyuan Chemical Technology Co., Ltd. | China national standards | MT | 211.25 | USD | 20251013 |