| Vendor | Spec | Unit | Price | Currency | Date |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 190.69 | USD | 20251126 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 186.24 | USD | 20251122 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 190.48 | USD | 20251122 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 186.25 | USD | 20251119 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 190.48 | USD | 20251119 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 190.53 | USD | 20251118 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 186.29 | USD | 20251118 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 186.4 | USD | 20251117 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 190.63 | USD | 20251117 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 190.5 | USD | 20251113 |