| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiancheng New Materials Co., Ltd. | China national standards | MT | 1011.41 | USD | 20250826 |
| Shandong Huize Chemical Technology Co., Ltd. | China national standards | MT | 1046.52 | USD | 20250826 |
| Shandong Mengkangda Chemical Co., Ltd. | China national standards | MT | 1011.79 | USD | 20250825 |
| Shandong Qiancheng New Materials Co., Ltd. | China national standards | MT | 1011.79 | USD | 20250825 |
| Shandong Qiancheng New Materials Co., Ltd. | China national standards | MT | 1009.52 | USD | 20250824 |
| Shandong Qiancheng New Materials Co., Ltd. | China national standards | MT | 1009.52 | USD | 20250822 |
| China national standards | MT | 260.0 | USD | 20210323 | |
| China national standards | MT | 240.0 | USD | 20210322 | |
| China national standards | MT | 1690.0 | USD | 20210322 | |
| China national standards | MT | 240.0 | USD | 20210319 |