| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 985.15 | USD | 20251007 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 999.23 | USD | 20251007 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 984.68 | USD | 20250929 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 998.75 | USD | 20250929 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 997.86 | USD | 20250928 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 983.81 | USD | 20250928 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 997.86 | USD | 20250927 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 983.81 | USD | 20250927 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 983.81 | USD | 20250926 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 997.86 | USD | 20250926 |