| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 351.32 | USD | 20250825 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 386.45 | USD | 20250825 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 364.55 | USD | 20250823 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 385.58 | USD | 20250823 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 392.59 | USD | 20250823 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 392.59 | USD | 20250822 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 385.58 | USD | 20250822 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 350.53 | USD | 20250822 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 364.55 | USD | 20250822 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 364.72 | USD | 20250821 |