| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Huiyihai Water Purification Materials Co., Ltd. | China national standards | MT | 211.67 | USD | 20251113 |
| Henan Leavit Chemical Technology Co., Ltd. | 400 VOCs | MT | 508.01 | USD | 20251113 |
| Henan Leavit Chemical Technology Co., Ltd. | 600 VOCs | MT | 352.78 | USD | 20251113 |
| Hebei Junshen Environmental Technology Co., Ltd. | 900 VOCs | MT | 607.06 | USD | 20251112 |
| Hebei Junshen Environmental Technology Co., Ltd. | 700 VOCs | MT | 324.71 | USD | 20251112 |
| Hebei Junshen Environmental Technology Co., Ltd. | 600 VOCs | MT | 310.59 | USD | 20251112 |
| Hebei Junshen Environmental Technology Co., Ltd. | 800 VOCs | MT | 423.53 | USD | 20251112 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 211.77 | USD | 20251112 |
| Henan Qingmai Environmental Protection Technology Co., Ltd. | 800 VOCs | MT | 1058.83 | USD | 20251112 |
| Henan Qingmai Environmental Protection Technology Co., Ltd. | China national standards | MT | 790.59 | USD | 20251112 |