| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1302.69 | USD | 20251013 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 985.82 | USD | 20251013 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 985.25 | USD | 20251011 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1301.94 | USD | 20251011 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1301.94 | USD | 20251010 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 985.25 | USD | 20251010 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 984.5 | USD | 20251009 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1301.81 | USD | 20250930 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 985.15 | USD | 20250930 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 984.68 | USD | 20250929 |