| TYWH's quality standard is based on Chinese national standard GB10665-2004, with even stricter criteria applied to ensure superior quality. | |||||
| Quality Standard | Gas Yield | Size percentage | PH3 %(V/V) | H2S %(V/V) | Ash,% |
| KEDE Standard |
≥250 L/KG | ≥90% | ≤0.04% | ≤0.04% | ≤1% |
| GB 10665-2004 | ≥260 L/KG | ≥85% | ≤0.08% | ≤0.1% | ≤5% |



