| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1058.2 | USD | 20251123 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 987.65 | USD | 20251121 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1058.2 | USD | 20251121 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 987.24 | USD | 20251120 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1057.75 | USD | 20251120 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 987.7 | USD | 20251119 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1058.25 | USD | 20251119 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 987.92 | USD | 20251118 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1058.48 | USD | 20251118 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 1059.08 | USD | 20251117 |