| Vendor | Spec | Unit | Price | Currency | Date |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1646.67 | USD | 20251205 |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1647.04 | USD | 20251204 |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1646.55 | USD | 20251203 |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1646.43 | USD | 20251201 |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1645.74 | USD | 20251128 |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1624.78 | USD | 20251127 |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1624.39 | USD | 20251126 |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1637.82 | USD | 20251125 |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1692.41 | USD | 20251120 |
| Weifang Yixin Chemical Co., Ltd. | China national standards | MT | 1693.58 | USD | 20251118 |