Trichloroisocyanuric acid and sodium dichloroisocyanurate are high-efficient, low-toxic, broad-spectrum and rapid disinfectant. They can rapidly kill all kinds of bacteria, fungi, bud, mildew, vibrio cholera,HAV, HBV,venereal virus and HIV. They have also the functions of algae removing, deodorizing, purifying water and bleaching. They are harmless to human and poultry, and will not produce second-pollution. They are widely used in disinfection of swimming pools, drink water and industrial circulating water, disfection in food processing industry, catering industry, aquaculture industry, chemical industry concerning to daily necessities, medical treatment, nurseries, kindergartens, epidemic prevention, rubbish treatment, hotels and restaurants, as well as disinfection after natural or manmade disasters.