Stability of HAV Inactivated by chlorine treatment of drinking water formalin(0.35%, 37C, 72hours) acetic acid(2%, 4hours) B-propiolactone(0.25% Thours)(β-乙丙内酯) Ultraviolet radiation (2u w/cm/min autoclaving, boiling in water for 5 minutes dry heat at 1 80 for l hourStability of HAV Inactivated by: chlorine treatment of drinking water formalin(0.35%, 37℃, 72hours) acetic acid(2%, 4hours) B-propiolactone (0.25%,1hours)（β-乙丙内酯） Ultraviolet radiation (2µW/㎝2/min) Autoclaving, boiling in water for 5 minutes, dry heat at 180 for 1 hour