| Vendor | Spec | Unit | Price | Currency | Date |
| Wanhua Chemical Group Co., Ltd. | China national standards | MT | 983.81 | USD | 20250928 |
| Wanhua Chemical Group Co., Ltd. | China national standards | MT | 983.81 | USD | 20250926 |
| Wanhua Chemical Group Co., Ltd. | China national standards | MT | 985.12 | USD | 20250925 |
| Wanhua Chemical Group Co., Ltd. | China national standards | MT | 992.16 | USD | 20250924 |
| Wanhua Chemical Group Co., Ltd. | China national standards | MT | 992.16 | USD | 20250923 |
| Wanhua Chemical Group Co., Ltd. | China national standards | MT | 991.48 | USD | 20250922 |
| Wanhua Chemical Group Co., Ltd. | China national standards | MT | 1012.26 | USD | 20250919 |
| Wanhua Chemical Group Co., Ltd. | China national standards | MT | 1012.87 | USD | 20250918 |