| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 324.91 | USD | 20251129 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 324.91 | USD | 20251128 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 324.91 | USD | 20251128 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 324.96 | USD | 20251127 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 324.96 | USD | 20251127 |