| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1458.17 | USD | 20250506 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1458.05 | USD | 20250430 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1457.75 | USD | 20250429 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1457.46 | USD | 20250428 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1457.0 | USD | 20250427 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 1455.99 | USD | 20250423 |