| Vendor | Spec | Unit | Price | Currency | Date |
| Yibin Tianyuan Group Co., Ltd. | China national standards | MT | 2250.16 | USD | 20250922 |
| Jia'en Chemical (Shandong) Co., Ltd. | China national standards | MT | 2193.91 | USD | 20250922 |
| Yibin Tianyuan Group Co., Ltd. | China national standards | MT | 2249.47 | USD | 20250919 |
| Jia'en Chemical (Shandong) Co., Ltd. | China national standards | MT | 2193.23 | USD | 20250919 |
| Yibin Tianyuan Group Co., Ltd. | China national standards | MT | 2250.83 | USD | 20250918 |
| Jia'en Chemical (Shandong) Co., Ltd. | China national standards | MT | 2194.56 | USD | 20250918 |
| Yibin Tianyuan Group Co., Ltd. | China national standards | MT | 2252.66 | USD | 20250916 |
| Yibin Tianyuan Group Co., Ltd. | China national standards | MT | 2251.75 | USD | 20250915 |
| Yibin Tianyuan Group Co., Ltd. | China national standards | MT | 2252.44 | USD | 20250911 |
| Yibin Tianyuan Group Co., Ltd. | China national standards | MT | 2251.55 | USD | 20250910 |