| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 324.49 | USD | 20251027 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 211.62 | USD | 20251027 |
| Henan Leavit Chemical Technology Co., Ltd. | 700 VOCs | MT | 536.11 | USD | 20251027 |
| Henan Leavit Chemical Technology Co., Ltd. | 500 VOCs | MT | 507.89 | USD | 20251027 |
| Henan Leavit Chemical Technology Co., Ltd. | 400 VOCs | MT | 507.89 | USD | 20251027 |
| Henan Leavit Chemical Technology Co., Ltd. | 600 VOCs | MT | 352.7 | USD | 20251027 |
| Henan Huiyihai Water Purification Materials Co., Ltd. | China national standards | MT | 211.48 | USD | 20251026 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 211.48 | USD | 20251026 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 324.27 | USD | 20251026 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 211.48 | USD | 20251026 |