| Vendor | Spec | Unit | Price | Currency | Date |
| Yixing Wencheng Chemical Co., Ltd. | China national standards | MT | 1102.26 | USD | 20251208 |
| Yixing Wencheng Chemical Co., Ltd. | China national standards | MT | 1102.74 | USD | 20251204 |
| Yixing Wencheng Chemical Co., Ltd. | China national standards | MT | 1100.65 | USD | 20251103 |
| Yixing Wencheng Chemical Co., Ltd. | China national standards | MT | 1100.82 | USD | 20251028 |
| Yixing Wencheng Chemical Co., Ltd. | China national standards | MT | 1099.01 | USD | 20251020 |
| Yixing Wencheng Chemical Co., Ltd. | China national standards | MT | 1098.39 | USD | 20250917 |