The most current information available is that veterinary coronaviruses can stay alive on inanimate objects in ideal conditions (cold and humid) for as long as 28 days. Human coronaviruses can go as long as 9.
Although the studies the authors summarize in this review did not investigate COVID-19, they believe that the results are also likely to be relevant to this latest coronavirus. All the human coronaviruses that the research had investigated seem to be susceptible to the same chemical agents.
Scientists from the Greifswald University Hospital and Ruhr-Universität Bochum, both in Germany, recently compiled information from 22 studies on coronaviruses. Their work helps us understand how long coronaviruses survive on surfaces, and how people may be able to destroy them.
The authors initially compiled the information for inclusion in an upcoming textbook; but … “under the circumstances, the best approach was to publish these verified scientific facts in advance, in order to make all information available at a glance.”