| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Laya Chemical Co., Ltd. | China national standards | MT | 478.27 | USD | 20250902 |
| Shandong Laya Chemical Co., Ltd. | China national standards | MT | 478.39 | USD | 20250901 |
| Shandong Laya Chemical Co., Ltd. | China national standards | MT | 478.67 | USD | 20250830 |
| Shandong Laya Chemical Co., Ltd. | China national standards | MT | 478.67 | USD | 20250829 |
| Shandong Laya Chemical Co., Ltd. | China national standards | MT | 478.45 | USD | 20250828 |
| Shandong Laya Chemical Co., Ltd. | China national standards | MT | 478.45 | USD | 20250828 |
| Shandong Laya Chemical Co., Ltd. | China national standards | MT | 478.15 | USD | 20250827 |
| Shandong Laya Chemical Co., Ltd. | China national standards | MT | 477.61 | USD | 20250826 |
| Shandong Laya Chemical Co., Ltd. | China national standards | MT | 477.79 | USD | 20250825 |
| Shandong Laya Chemical Co., Ltd. | China national standards | MT | 476.72 | USD | 20250823 |