| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 392.18 | USD | 20250804 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 385.18 | USD | 20250804 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 364.17 | USD | 20250804 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 363.66 | USD | 20250801 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 384.64 | USD | 20250801 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 391.63 | USD | 20250801 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 391.64 | USD | 20250731 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 384.65 | USD | 20250731 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 349.68 | USD | 20250731 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 363.67 | USD | 20250731 |