| Vendor | Spec | Unit | Price | Currency | Date |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 1209.46 | USD | 20250922 |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 1012.57 | USD | 20250922 |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 1209.09 | USD | 20250920 |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 1209.82 | USD | 20250918 |