| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1060.97 | USD | 20250825 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 969.63 | USD | 20250825 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1058.59 | USD | 20250823 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 967.46 | USD | 20250823 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 967.46 | USD | 20250822 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1058.59 | USD | 20250822 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1059.1 | USD | 20250821 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 967.92 | USD | 20250821 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 966.6 | USD | 20250820 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1057.66 | USD | 20250820 |