| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Huize Chemical Technology Co., Ltd. | China national standards | MT | 566.45 | USD | 20250715 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 559.46 | USD | 20250715 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 559.51 | USD | 20250714 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 559.51 | USD | 20250714 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 559.64 | USD | 20250712 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 559.64 | USD | 20250711 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 559.36 | USD | 20250710 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 559.12 | USD | 20250709 |
| Shandong Huize Chemical Technology Co., Ltd. | China national standards | MT | 566.11 | USD | 20250709 |
| Shandong Huize Chemical Technology Co., Ltd. | China national standards | MT | 566.16 | USD | 20250708 |