| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 403.81 | USD | 20250823 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 448.68 | USD | 20250823 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 448.68 | USD | 20250822 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 403.81 | USD | 20250822 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 399.6 | USD | 20250822 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 399.79 | USD | 20250821 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 404.0 | USD | 20250821 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 448.89 | USD | 20250821 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 448.28 | USD | 20250820 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 403.45 | USD | 20250820 |