| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 819.66 | USD | 20250816 |
| Shandong Laya Chemical Co., Ltd. | China national standards | MT | 784.63 | USD | 20250816 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 819.66 | USD | 20250815 |
| Shandong Xingpeng Yongfa Chemical Co., Ltd. | China national standards | MT | 784.63 | USD | 20250815 |
| Shandong Qiancheng New Materials Co., Ltd. | China national standards | MT | 840.68 | USD | 20250815 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 819.66 | USD | 20250815 |
| China national standards | MT | 3750.0 | USD | 20210323 | |
| China national standards | MT | 190.0 | USD | 20210323 | |
| China national standards | MT | 120.0 | USD | 20210323 | |
| China national standards | MT | 1140.0 | USD | 20210322 |