84 disinfectant is a chlorine-containing disinfectant solution that is harmful to the body. However, because of the current epidemic, many families will use 84 disinfectant to disinfect. It is important to note that this disinfectant will release chlorine after a period of time, which can cause major irritation to the nasal mucosa, conjunctiva and skin, and if serious, human death and chlorine poisoning can occur. Therefore, it is recommended that 84 disinfection at home must pay attention to disinfection according to the ratio, while disinfection must pay attention to proper opening of windows and ventilation after disinfection, so as to avoid an excessive amount of 84 disinfectant and cause harm to the human body. In addition, when applying 84 disinfectant, wear a mask to avoid direct contact with the skin.