| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.53 | USD | 20250901 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.83 | USD | 20250829 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.59 | USD | 20250828 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 626.2 | USD | 20250828 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 625.81 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 506.27 | USD | 20250827 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 505.7 | USD | 20250826 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 625.11 | USD | 20250826 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 625.34 | USD | 20250825 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 505.9 | USD | 20250825 |