| Vendor | Spec | Unit | Price | Currency | Date |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 190.75 | USD | 20251209 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 186.51 | USD | 20251209 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 186.58 | USD | 20251205 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 190.69 | USD | 20251202 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 186.46 | USD | 20251202 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 190.71 | USD | 20251130 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 186.47 | USD | 20251130 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 186.47 | USD | 20251128 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 190.71 | USD | 20251128 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 190.69 | USD | 20251126 |