| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 626.34 | USD | 20251010 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.7 | USD | 20251010 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.31 | USD | 20251009 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 625.86 | USD | 20251009 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 626.28 | USD | 20250930 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.65 | USD | 20250930 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.41 | USD | 20250929 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 625.42 | USD | 20250928 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 505.96 | USD | 20250928 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 505.96 | USD | 20250926 |