| Vendor | Spec | Unit | Price | Currency | Date |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 634.87 | USD | 20251027 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 634.45 | USD | 20251024 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 634.21 | USD | 20251022 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 634.26 | USD | 20251017 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 633.85 | USD | 20251015 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 633.74 | USD | 20251013 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 633.37 | USD | 20251011 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 632.89 | USD | 20251009 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 633.01 | USD | 20250929 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 632.86 | USD | 20250922 |