| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 274.37 | USD | 20250901 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 274.37 | USD | 20250901 |
| Guangxi Tiandong Jinyi Technology Co., Ltd. | China national standards | MT | 492.46 | USD | 20250901 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 351.96 | USD | 20250831 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 284.39 | USD | 20250831 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 284.39 | USD | 20250831 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 351.96 | USD | 20250830 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 284.39 | USD | 20250830 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 284.39 | USD | 20250830 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 359.0 | USD | 20250829 |