| Vendor | Spec | Unit | Price | Currency | Date |
| Suzhou Zhaohua Chemical Co., Ltd. | China national standards | MT | 281.4 | USD | 20250901 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 175.88 | USD | 20250901 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 189.95 | USD | 20250901 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 175.98 | USD | 20250831 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 175.98 | USD | 20250830 |
| Jiangxi JINGHAO Salt Chemical Co., Ltd. | China national standards | MT | 204.14 | USD | 20250830 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 190.06 | USD | 20250830 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 175.98 | USD | 20250829 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 190.06 | USD | 20250829 |
| Jiangxi JINGHAO Salt Chemical Co., Ltd. | China national standards | MT | 204.14 | USD | 20250829 |