| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Leavit Chemical Technology Co., Ltd. | 600 VOCs | MT | 352.98 | USD | 20251125 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 211.79 | USD | 20251125 |
| Henan Huiyihai Water Purification Materials Co., Ltd. | China national standards | MT | 211.79 | USD | 20251125 |
| Henan Sendi Environmental Protection Technology Co., Ltd. | China national standards | MT | 352.98 | USD | 20251125 |
| Henan Sendi Environmental Protection Technology Co., Ltd. | 1000 VOCs | MT | 635.17 | USD | 20251124 |
| Henan Leavit Chemical Technology Co., Ltd. | 700 VOCs | MT | 536.37 | USD | 20251124 |
| Henan Leavit Chemical Technology Co., Ltd. | 500 VOCs | MT | 508.14 | USD | 20251124 |
| Henan Sendi Environmental Protection Technology Co., Ltd. | China national standards | MT | 352.87 | USD | 20251124 |
| Henan Huiyihai Water Purification Materials Co., Ltd. | China national standards | MT | 211.72 | USD | 20251124 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 324.64 | USD | 20251124 |