| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 400.91 | USD | 20250902 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 450.14 | USD | 20250902 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 450.25 | USD | 20250901 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 405.22 | USD | 20250901 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 401.0 | USD | 20250901 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 401.24 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 405.46 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 450.51 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 405.27 | USD | 20250828 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 450.3 | USD | 20250828 |