| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1181.9 | USD | 20250901 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1170.64 | USD | 20250901 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1167.83 | USD | 20250901 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1168.52 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1171.34 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1182.6 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1171.34 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1171.34 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1170.79 | USD | 20250828 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1182.05 | USD | 20250828 |