This product is an organic chelating agent for heavy metals in fly ash. The fly ash from MSW incineration contains Hg, Mn, Mg, Sn, Cr, Cd, Pb and other heavy metal elements, as well as trace dioxin like organic matter and other pollutants. Easy to cause harm to human body and environment. The product can effectively chelate heavy metals in fly ash, so as to achieve the standard of domestic waste landfill.