I was referring to some article I read but actually it seems there is no easily available information on its persistency. “Persistency Novichok agents have a hi

I was referring to some article I read but actually it seems there is no easily available information on its persistency. “Persistency Novichok agents have a higher density than air and will therefore tend to collect in low-lying areas. No other information is available regarding their persistency.” https://www.sciencedirect.com/topics/neuroscience/novichok-agent https://www.sciencedirect.com/topics/neuroscience/novichok-a... Do you care to share your sources?