| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Kaijie Water Treatment Co., Ltd. | 1000 VOCs | MT | 1241.62 | USD | 20251122 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 211.64 | USD | 20251122 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 324.51 | USD | 20251121 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 211.64 | USD | 20251121 |
| Henan Huiyihai Water Purification Materials Co., Ltd. | China national standards | MT | 211.64 | USD | 20251121 |
| Henan Qingmai Environmental Protection Technology Co., Ltd. | China national standards | MT | 790.12 | USD | 20251121 |
| Henan Sendi Environmental Protection Technology Co., Ltd. | China national standards | MT | 352.73 | USD | 20251121 |
| Henan Leavit Chemical Technology Co., Ltd. | 500 VOCs | MT | 507.94 | USD | 20251121 |
| Henan Sendi Environmental Protection Technology Co., Ltd. | 1000 VOCs | MT | 634.92 | USD | 20251121 |
| Henan Leavit Chemical Technology Co., Ltd. | 400 VOCs | MT | 507.94 | USD | 20251121 |