| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1198.4 | USD | 20251024 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1198.57 | USD | 20251023 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1197.96 | USD | 20251022 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1198.04 | USD | 20251017 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1196.37 | USD | 20251011 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1196.26 | USD | 20250930 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 1196.26 | USD | 20250930 |