| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1120.98 | USD | 20250805 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1236.78 | USD | 20250804 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1120.53 | USD | 20250804 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1260.59 | USD | 20250804 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1235.03 | USD | 20250801 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1258.81 | USD | 20250801 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1118.94 | USD | 20250801 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1258.85 | USD | 20250731 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1235.07 | USD | 20250731 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1235.98 | USD | 20250730 |