| Vendor | Spec | Unit | Price | Currency | Date |
| Yixing Wencheng Chemical Co., Ltd. | China national standards | MT | 1017.47 | USD | 20251208 |
| Yixing Wencheng Chemical Co., Ltd. | China national standards | MT | 1017.91 | USD | 20251204 |
| Yixing Wencheng Chemical Co., Ltd. | China national standards | MT | 1015.99 | USD | 20251103 |
| Yixing Wencheng Chemical Co., Ltd. | China national standards | MT | 1016.15 | USD | 20251028 |
| Yixing Wencheng Chemical Co., Ltd. | China national standards | MT | 1014.47 | USD | 20251020 |