| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Sendi EnvTech | China national standards | MT | 351.48 | USD | 20250919 |
| Henan Sendi EnvTech | 1000 VOCs | MT | 633.04 | USD | 20250918 |
| Henan Sendi EnvTech | China national standards | MT | 351.69 | USD | 20250918 |
| Henan Sendi EnvTech | China national standards | MT | 351.69 | USD | 20250918 |