| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Sendi Environmental Protection Technology Co., Ltd. | 1000 VOCs | MT | 636.2 | USD | 20251204 |
| Henan Leavit Chemical Technology Co., Ltd. | 400 VOCs | MT | 508.96 | USD | 20251204 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 212.07 | USD | 20251204 |
| Hebei Junshen Environmental Technology Co., Ltd. | 600 VOCs | MT | 311.03 | USD | 20251204 |
| Henan Huiyihai Water Purification Materials Co., Ltd. | China national standards | MT | 212.07 | USD | 20251204 |
| Henan Qingmai Environmental Protection Technology Co., Ltd. | 800 VOCs | MT | 1060.33 | USD | 20251204 |
| Henan Qingmai Environmental Protection Technology Co., Ltd. | China national standards | MT | 791.71 | USD | 20251204 |
| Henan Sendi Environmental Protection Technology Co., Ltd. | China national standards | MT | 353.34 | USD | 20251203 |
| Henan Huiyihai Water Purification Materials Co., Ltd. | China national standards | MT | 212.0 | USD | 20251203 |
| Henan Qingmai Environmental Protection Technology Co., Ltd. | 800 VOCs | MT | 1060.01 | USD | 20251203 |