| Vendor | Spec | Unit | Price | Currency | Date |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 636.05 | USD | 20251205 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 635.65 | USD | 20251202 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 635.69 | USD | 20251130 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 635.69 | USD | 20251128 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 635.63 | USD | 20251126 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 634.92 | USD | 20251122 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 634.95 | USD | 20251119 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 635.09 | USD | 20251118 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 635.45 | USD | 20251117 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 635.01 | USD | 20251113 |