Physan-20 Kill Coronavirus?
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Old 10-24-2021, 02:38 PM
Arizona Jeanie Arizona Jeanie is offline
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Physan-20 Kill Coronavirus?

I'm surprised no one has mentioned this yet:
Aerosolized alcohol is highly flammable, vapors can be explosive. Be careful! It should only be used in a well ventilated area.
Also, 70% isopropyl alcohol is a better disinfectant than 91%.
For surface disinfection, contact time is important, I think it's at least 20 seconds for 70% alcohol hand sanitizers, I don't know what it is for alcohol spray.
Read the label on those Chlorox wipes, mine says the surface has to be "visibly wet for four minutes".
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Old 11-06-2022, 12:29 AM
MateoinLosAngeles MateoinLosAngeles is offline
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Originally Posted by Ray View Post
I use a single liquid product for shampoo, body wash and shaving lubricant in the shower. Back when I was on the road 5-6 days a week and spent a lot of time in the hot end of glass plants (ambient temperature about 115-120F), I would “spike” the soap product with a half teaspoon Physan per bottle to make it more strongly antibacterial. Did that for several years and never had a problem.
Wait, Ray! The REI for Physan 20 is 12 hours... Even though it seems like an arbitrary standard number, I really don't know how serious is that because the information as to "why" is not provided.

But... you used it in your shampoo?! I guess that means the 12h are an overkill...
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Old 11-06-2022, 07:53 AM
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Ray Ray is offline
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Physan-20 Kill Coronavirus? Male

REI is applied to pesticides and disinfectants at their intended usage concentrations. It is a safety factor guideline, not an absolute “before=dangerous/after=safe” number.

The chemicals in Physan are also used in swimming pools, yet people are not kept from the water for 12 hours.
Ray Barkalow, Orchid Iconoclast
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