PHMG is an antivirus agent, algae inhibitor, with toxicity free and no irritation to human skin, and has successfully applied in the fields of health remedy, medical use, textile, wet tissue, fishery, food processing, water treatment, etc. It is a cationic polymer based on guanidine salts, as its active component. It forms thin deposits on the objects and surfaces and helps to eliminate germs and bacteria by penetrating their cell wall and choking off the channels necessary for their survival. in addition to this, it presents several advantages such as shows stability at high temperature, has a long-lasting effect, easily soluble in water, completely eco-friendly, non-corrosive to most of the metals, wood, plastics and rubber.