| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 504.41 | USD | 20250815 |
| Shandong Jinwen Chemical Co., Ltd. | China national standards | MT | 504.41 | USD | 20250815 |
| Shandong Fushengyong Trading Co., Ltd. | China national standards | MT | 700.56 | USD | 20250815 |
| Shandong Fushengyong Trading Co., Ltd. | China national standards | MT | 700.56 | USD | 20250815 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 539.69 | USD | 20250814 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 539.69 | USD | 20250814 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 504.65 | USD | 20250814 |