| Vendor | Spec | Unit | Price | Currency | Date |
| Wanhua Chemical Group Co., Ltd. | China national standards | MT | 930.18 | USD | 20251022 |
| Wanhua Chemical Group Co., Ltd. | China national standards | MT | 930.49 | USD | 20251021 |
| Wanhua Chemical Group Co., Ltd. | China national standards | MT | 929.93 | USD | 20251020 |
| Wanhua Chemical Group Co., Ltd. | China national standards | MT | 930.25 | USD | 20251017 |
| Wanhua Chemical Group Co., Ltd. | China national standards | MT | 957.81 | USD | 20251015 |
| Wanhua Chemical Group Co., Ltd. | China national standards | MT | 957.65 | USD | 20251013 |
| Wanhua Chemical Group Co., Ltd. | China national standards | MT | 971.17 | USD | 20251011 |
| Wanhua Chemical Group Co., Ltd. | China national standards | MT | 970.44 | USD | 20251009 |
| Wanhua Chemical Group Co., Ltd. | China national standards | MT | 985.15 | USD | 20250930 |
| Wanhua Chemical Group Co., Ltd. | China national standards | MT | 984.68 | USD | 20250929 |