| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1107.51 | USD | 20251101 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1128.67 | USD | 20251101 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1128.67 | USD | 20251031 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1107.51 | USD | 20251031 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1114.56 | USD | 20251031 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1114.56 | USD | 20251031 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1100.45 | USD | 20251031 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1114.81 | USD | 20251030 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1128.92 | USD | 20251030 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1107.76 | USD | 20251030 |