| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 329.32 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 364.35 | USD | 20250819 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 343.33 | USD | 20250819 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 294.44 | USD | 20250818 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 294.44 | USD | 20250818 |
| China national standards | MT | 480.0 | USD | 20210323 | |
| China national standards | MT | 610.0 | USD | 20210323 | |
| China national standards | MT | 590.0 | USD | 20210323 | |
| China national standards | MT | 590.0 | USD | 20210323 | |
| China national standards | MT | 620.0 | USD | 20210323 |