| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 406.35 | USD | 20251121 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 402.12 | USD | 20251121 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 406.18 | USD | 20251120 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 401.95 | USD | 20251120 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 451.31 | USD | 20251120 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 406.37 | USD | 20251119 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 451.52 | USD | 20251119 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 402.13 | USD | 20251119 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 402.22 | USD | 20251118 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 406.46 | USD | 20251118 |