It is a kind of heavy metal eliminating agent, developed to protect environment and avoid heavy metal pollution in waste water. It has extremely high heavy metal eliminating efficiency even with a small dosage. All other existing heavy metal eliminating agents tend to selectively react with some heavy metals and are smelly and toxic, while this product has conquered all these weaknesses. Na3T is a triazine component, capable to settle down almost all monovalent and divalent metals such as copper, cadmium, mercury, silver, lead and tin. It can also eliminate heavy metals that have already turned into complexes, so is especially suitable to settle down mercury, copper, cadmium, silver, lead, nickel and tin. Comparing to similar heavy metal repair agent, this product is less toxic and much safer, which is its important value.