| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 353.16 | USD | 20251129 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 367.29 | USD | 20251129 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 367.29 | USD | 20251128 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 353.16 | USD | 20251128 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 395.54 | USD | 20251128 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 388.48 | USD | 20251128 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 367.34 | USD | 20251127 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 353.21 | USD | 20251127 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 395.6 | USD | 20251127 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 353.13 | USD | 20251126 |