| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Sendi EnvTech | China national standards | MT | 352.73 | USD | 20251121 |
| Henan Sendi EnvTech | China national standards | MT | 352.58 | USD | 20251120 |
| Henan Sendi EnvTech | China national standards | MT | 352.58 | USD | 20251120 |
| Henan Sendi EnvTech | 1000 VOCs | MT | 634.65 | USD | 20251120 |
| Henan Sendi EnvTech | 1000 VOCs | MT | 634.95 | USD | 20251119 |
| Henan Sendi EnvTech | China national standards | MT | 352.75 | USD | 20251119 |
| Henan Sendi EnvTech | China national standards | MT | 352.75 | USD | 20251119 |
| Henan Sendi EnvTech | China national standards | MT | 352.83 | USD | 20251118 |
| Henan Sendi EnvTech | China national standards | MT | 352.83 | USD | 20251118 |
| Henan Sendi EnvTech | 1000 VOCs | MT | 635.09 | USD | 20251118 |