| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1241.77 | USD | 20250827 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1265.68 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1240.38 | USD | 20250826 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1264.26 | USD | 20250826 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1123.78 | USD | 20250826 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1264.74 | USD | 20250825 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1124.21 | USD | 20250825 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1240.85 | USD | 20250825 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1124.21 | USD | 20250825 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1238.06 | USD | 20250823 |