Used for treatment of industrial circulating water, algae fungicidal effect. It is a kind of widely sterilization preservatives, can effectively kill algae, bacteria and fungi. The activity of single dose can be widely used in industrial cooling water, oil field back to the pitcher of water, pulp and paper industry, pipes, coating, paint, rubber, film, and cleaning products and cosmetics industries. Effective dosage is less, non-toxic pollution-free, easy to mix in all kinds of formula, wide PH range, after using concentration dilution, easily biodegradable non-toxic pollution-free material.