| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1329.64 | USD | 20250901 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1330.42 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1295.23 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1294.63 | USD | 20250828 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1329.81 | USD | 20250828 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1328.96 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1293.81 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1292.35 | USD | 20250826 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1327.47 | USD | 20250826 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1292.84 | USD | 20250825 |