3. What are the physical and chemical characteristics of coronavirus?

Coronavirus in human is sensitive to ultraviolet rays and heat. It can be stored for several years at -60 °C. However, with the increase of temperature, the resistance of the virus decreases. Coronavirus can be effectively inactivated after 30 minutes at 56 °C. Coronavirus in human is not resistant to acids and alkalis, and the optimal pH for virus replication is 7.2.

lipid solvents such as ether, 75% ethanol, chlorine-containing disinfectant, peroxyacetic acid and chloroform can inactivate the virus. However, chlorhexidine cannot effectively inactivate it.