What dilution ratio of 84 disinfectant is needed to kill hepatitis B virus?
Dec 02, 2025
Source: Cainiu Health
Dr. Gao Jun
Introduction
Diluting 84 Disinfectant at a ratio of 1:100 yields a free chlorine concentration of 500 mg/L, which can effectively inactivate the hepatitis B virus after an exposure time of more than 30 minutes. In cases of severe contamination, the dilution ratio may be adjusted to 1:50, resulting in a free chlorine concentration of 1000 mg/L, with the contact time extended to 60 minutes. If exposure to hepatitis B virus-contaminated materials occurs,
Disinfectant 84 diluted at a ratio of 1:100 yields a free chlorine concentration of 500 milligrams per liter; acting for more than 30 minutes effectively kills the hepatitis B virus. In cases of severe contamination, the ratio can be adjusted to 1:50, resulting in a free chlorine concentration of 1,000 milligrams per liter, with exposure time extended to 60 minutes. If skin or mucous membrane damage occurs after contact with hepatitis B virus-contaminated materials, prompt medical attention is recommended.
The hepatitis B virus has strong resistance to external environments, tolerating low temperatures and drying, but it is sensitive to chlorine-containing disinfectants. The active chlorine in Disinfectant 84 destroys the virus's protein coat and nucleic acid structure, rendering it inactive. Proper dilution ratio and sufficient contact time are key factors in inactivating the virus.
When diluting, use clean water only and avoid mixing with acidic substances such as vinegar or ammonia, which may generate toxic gases. Ensure adequate ventilation during disinfection. After spraying or wiping surfaces, allow sufficient standing time to ensure effectiveness—do not arbitrarily reduce concentration or shorten exposure duration.
Wear gloves and masks for protection before using Disinfectant 84. Use the diluted solution promptly and do not store it for prolonged periods. After disinfection, wipe surfaces with clean water to remove residual disinfectant, paying special attention to frequently touched items such as tableware and toys, to prevent irritation to skin and mucous membranes.
