A brief Google suggests BZK is effective against SARS-Cov-2 on surfaces. There is no research on it on hands that I found specifically for coronaviruses. Hands are generally more difficult to disinfect.
I’d be most skeptical of the claim it is effective for 24 hours on hands, so if you did get it, I would re-apply whenever you would normally use alcohol-based sanitiser and not rely on this claim.
This paper suggests BZK is more persistent on hands than alcohol based sanitiser for a bacterium (MRSA), which makes sense a priori, but only up to 4 hours.
Also, it may interest some people that BZK is the active ingredient in Lysol spray (US) and Dettol spray (UK). (Do not use them as hand sanitiser as they have other ingredients and are not formulated for hands!)
A brief Google suggests BZK is effective against SARS-Cov-2 on surfaces. There is no research on it on hands that I found specifically for coronaviruses. Hands are generally more difficult to disinfect.
https://www.ecdc.europa.eu/sites/default/files/documents/coronavirus-SARS-CoV-2-guidance-environmental-cleaning-non-healthcare-facilities.pdf
https://www.ncbi.nlm.nih.gov/pubmed/15923059 (About SARS-CoV, but similar enough virology that it probably applies)
I’d be most skeptical of the claim it is effective for 24 hours on hands, so if you did get it, I would re-apply whenever you would normally use alcohol-based sanitiser and not rely on this claim.
This paper suggests BZK is more persistent on hands than alcohol based sanitiser for a bacterium (MRSA), which makes sense a priori, but only up to 4 hours.
Update with some more info:
https://www.compoundchem.com/2020/03/04/hand-sanitisers/ has some general information about hand sanitisers and includes info about BZK—they caution that it works less quickly than alcohol based ones, so perhaps that’s useful to take into account.
Also, it may interest some people that BZK is the active ingredient in Lysol spray (US) and Dettol spray (UK). (Do not use them as hand sanitiser as they have other ingredients and are not formulated for hands!)