I've seen this mentioned in passing in a couple of threads but it deserves it's own so it's easy to find.  If you comment, PLEASE INCLUDE A CREDIBLE SOURCE that states effectiveness against a coronavirus, even if it's not the 2019 edition.

Some good overview articles I've found:

Human Coronaviruses: Insights into Environmental Resistance and Its Influence on the Development of New Antiseptic Strategies

Bleach (Sodium hypochlorite) needs to be a strong enough concentration. <1% strength didn't work.

Quats are not effective by themselves

Persistence of coronaviruses on inanimate surfaces and its inactivation with biocidal agents

Another positive result with bleach and 70% alcohol.

Efficacy of various disinfectants against SARS coronavirus

Another good result for alcohol handrubs. The commercial disinfectants listed here aren't ones I've heard of.

Interim List of Household Products and Active Ingredients for Disinfection of Novel Coronavirus (2019-nCoV)

Recommends Clorox (Alkyl dimenthylbenzyl ammonium chloride), Simple Green and bleach in the right strengths.

70% isopropyl alcohol is better than 99% alcohol. The water improves the way the alcohol penetrates and kills viruses outer coatings.

Why Is 70% Isopropyl Alcohol (IPA) a Better Disinfectant than 99% Isopropanol, and What Is IPA Used For?

Alcohol based hand sanitizers also work well according to "Efficacy of various disinfectants against SARS coronavirus".

What doesn't work as well?

Benzethonium Chloride, commonly known as a 'quat' for quaternary ammonium compound. This is the active ingredient in Wet Ones hand sanitizer towels which I have been using. It has been reported as less effective against coronaviruses by one source.

Persistence of coronaviruses on inanimate surfaces and its inactivation with biocidal agents

Stay safe!

In a minute's time.  No way anything is growing with prolonged contact with 0.1% bleach.

From what I've read, cow piss seems to work well.

The links appear to contradict each other.

The Singapore NEA report you linked specifcally calls out quats/BZK as effective,
and half their recommended product list is quats.

It'd be nice to know what "less effective" really means in this context, but the report doesn't expand on that.

Exactly what surface are you trying to disinfect?  Is this surface in your home? Your work?  What are you trying to accomplish?

Lysol?

Yes, I noticed that there were quats listed in the Singapore document. My guess is they didn't do any testing on them. Also some of those products also contain bleach.

The "less effective" quats is a reference to the results shown in Table 2 in Sattar et al I think.

Disinfection of people and surfaces at home.

So you plan to bleach people?

And why do you need to disinfect surfaces in your home relating to coronavirus?  Do you have someone that was recently in China in your home?

Use a 10% bleach solution on surfaces, use Hibiclens on people.

Does Lysol kill the Coronavirus (2019-nCoV)?
Specific Lysol products have demonstrated effectiveness against viruses similar to 2019 Novel Coronavirus (2019-nCoV) on hard, non-porous surfaces. In accordance with the EPA Viral Emerging Pathogen Policy, the following Lysol products can be used against 2019 Novel Coronavirus (2019-nCoV) when used in accordance with the directions for use.

• Lysol® Disinfectant Spray EPA #777-99
• Lysol® Disinfectant Spray Max Cover Mist #777-127
• Lysol® Multi-Surface Cleaner Pourable EPA #777-89
• Lysol® Multi-Purpose Cleaner with Hydrogen Peroxide EPA #777-126
• Lysol® Multi-Purpose Cleaner with Bleach EPA #777-83
• Lysol® Power Bathroom Cleaner EPA #675-55
• Lysol® Power Foam Bathroom Cleaner EPA #777-71
• Lysol® Power Toilet Bowl Cleaner EPA #777-81
• Lysol® Toilet Bowl Cleaner with Bleach EPA #777-102

Please refer to the CDC website at https://www.cdc.gov/coronavirus/2019-ncov/ for additional information.

https://www.lysol.com/healthy-home/understanding-coronavirus/

NIH on alcohol hand sanitizers

Most alcohol-based hand antiseptics contain isopropanol, ethanol, n-propanol, or a combination of 2 of these products. The antimicrobial activity of alcohols can be attributed to their ability to denature and coagulate proteins. The microorganism’s cells are then lysed, and their cellular metabolism is disrupted. Alcohol solutions containing 60% to 95% alcohol are most effective. Notably, higher concentrations are less potent because proteins are not denatured easily in the absence of water. Alcohol concentrations in antiseptic hand rubs are often expressed as percent by volume, but sometimes as percent by weight.

Alcohols such as ethanol are well-known antimicrobial agents and were first recommended for the treatment of hands in 1888. The highest antimicrobial efficacy can be achieved with ethanol (60% to 85%), isopropanol (60% to 80%), and n-propanol (60% to 80%). The activity is broad and immediate. Ethanol, the most common alcohol ingredient, appears to be the most effective against viruses; whereas, the propanols have a better bactericidal activity than ethanol. None of the alcohols has shown a potential for acquired bacterial resistance. The combination of alcohols may have a synergistic effect. The concentration of alcohol does change the efficacy with one study showing a hand rub with 85% ethanol being significantly better at reducing bacterial populations compared to concentrations of 60% to 62%. ABHS also often contain humectants, like glycerin, which help prevent skin dryness, and emollients or moisturizers, like aloe vera, which help replace some of the water that is stripped by the alcohol.[4][5]

According to the Centers for Disease Control and Prevention (CDC), alcohols have excellent in vitro germicidal activity against gram-positive and gram-negative vegetative bacteria, including multidrug-resistant pathogens (MRSA, VRE), Mycobacterium tuberculosis, HIV, influenza virus, RSV, vaccinia, and hepatitis B and C viruses.

ABHS are tremendously effective in preventing the spread of the seasonal flu, H1N1, URI, and other viral-based and bacterial-based diseases. Ethanol hand sanitizers were significantly more effective than hand washing with soap and water for removal of detectable rhinovirus, the most frequent cause of the common cold, from hands. One concern is that the antimicrobial effect of ABHS is very short lived. The addition of organic acids to the ethanol provided residual virucidal activity that persisted for at least 4 hours.

A study published in 2017 in the Journal of Infectious Diseases evaluated the virucidal activity of ABHS against re-emerging viral pathogens, such as Ebola virus, Zika virus (ZIKV), severe acute respiratory syndrome coronavirus (SARS-CoV), and Middle East respiratory syndrome coronavirus (MERS-CoV) and determined that they and other enveloped viruses could be efficiently inactivated by both WHO formulations I and II (ethanol-based and isopropanol-based respectively). This further supports the use of ABHS in healthcare systems and viral outbreak situations.

According to the CDC, alcohol-based hand sanitizers are not effective against Cryptosporidium.

Studies have demonstrated that ABHS are often ineffective against non-enveloped viruses, including norovirus.
However, ethanol-based hand rubs have been effective against norovirus surrogates even at lower concentrations, when different types of acids are added to the hand rub. Also, the efficacy of alcohol-based hand rubs against noroviruses varies with type and concentration of alcohol in the formulation. WHO experts still do recommend the use of alcohol-based hand rubs during outbreaks of noroviral gastroenteritis.

There are exceptions regarding alcohol-based hand rub in vivo inactivity against non-enveloped viruses. Studies have found that alcohol sanitizers do reduce the infectivity titers of 3 non-enveloped viruses (rotavirus, adenovirus, and rhinovirus) and in higher concentrations of hepatitis A and enteroviruses.

A recent review found that ethanol at 80% is unlikely to sufficiently destroy poliovirus, polyomavirus, calicivirus (FCV), hepatitis A virus (HAV) and foot-and-mouth disease virus (FMDV). However, at 95%, the spectrum of virucidal activity of ethanol covers the majority of clinically relevant viruses. Additional acids can substantially improve the virucidal activity of ethanol at lower concentrations against, e.g., poliovirus, polyomavirus, FCV, and FMDV although some viruses like HAV may still be too resistant. The issue is the tolerability of ABHS at higher alcohol concentrations.

Technique
Efficacy is also very dependent on the technique of application of the alcohol hand sanitizer. One must apply the product to the palm and rub the product all over the surfaces of both hands until they are dry. There have been several studies comparing the amount needed to be effective (2.4 to 3 mL is recommended) and application time required to achieve hand disinfection (25 to 30 seconds).

Another study found that high-quality hygienic hand disinfection is not possible within 15 seconds and that a 30-second application time of ABHS is recommended. Thirty seconds is a long time to wait before proceeding with the activity one was setting out to do after disinfection, in fact, about the same time as washing with soap and water. The study also compared techniques of applying the alcohol rub, including a 6-step method, and found that “responsible application” was adequate, as long as people are made aware that they are responsible for covering their entire hands during hygienic hand disinfection

Not a technical thing, but an observed thing.

I have a rain catchment system at my hunting camp.  Basic gutter into rain barrels.   I dump bleach into the barrels occasionally to kill off the nasty stuff.

From this water I also have a shower hooked up.   If you shower with bleach water it seems to dry out your skin in a big way.

Might want to get some moisturizer also.

Assuming your M15 is exposed to biological contaminates, such as 2019 nCoV, what would be the best chemical to use to disinfect and sterilize it that would not compromise the protection integrity of the mask? A spray down with Lysol? Clorox wipes? A complete submersion (for a specified amount of time) in a water/bleach mix?

That's a really good question, I have a couple of Mestel and Mira masks but the booklets that come with them don't discuss a disinfection protocol AFAIK.

@Boatswain

I couldn’t find any full face respirators but I have several Israeli M15 masks that I’ll be using should it come to that. I asked this question in another thread and the answer I got was warm soapy water. I can see that for bacterial contamination (use a antibacterial soap) but not for viral contamination. Still searching for answers. I’ll update this thread if I find anything.

@Boatswain and anyone else with questions on cleaning/disinfecting a respirator. I found this on OSHA's website:

https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.134AppB2

I found this on 3M's website:

https://multimedia.3m.com/mws/media/473937O/3mtm-cleaning-reusable-respirators.pdf

Another great piece of documentation I found seems to be a field manual for the M40A1 gas mask. It has a lot of good info so I'll link it but not quote it:

https://www.fortbraggsurplus.us/v/vspfiles/assets/images/m40a1_gas_mask_manual.pdf

If hand sanitizer becomes scarce in your area, you might be able to make some yourself assuming you can get these items listed in this wiki:

Wikihow make your own hand sanitizer

Question for the smart people.  If I take a homer bucket and mix up 4 gallons of 1:10 bleach solution, how long will it be good for? Does the bleach evap out? What if the bucket is covered?  The idea is to drop in items like facemask/goggles into the bucket multiple times to disinfect over the course of days or weeks.

When our puppy contracted Parvo we where told, and research confirmed it was extremely hard to kill.  A bleach water mix of 1 to 10 is about the only thing to do it.  Recommended saturation time was ten minutes.  This ratio will kill just about anything with that saturation time.  Storage time after mixing no longer than 24 hours.

https://www.amazon.com/Clorox-Hydrogen-Peroxide-Disinfecting-Cleaner/dp/B06Y6K83V2/ref=pd_bxgy_3/134-7703278-0788219?_encoding=UTF8&pd_rd_i=B06Y6K83V2&pd_rd_r=86176420-b5a8-4429-9191-b6fab4a56d97&pd_rd_w=Sv2TY&pd_rd_wg=xhzob&pf_rd_p=fd08095f-55ff-4a15-9b49-4a1a719225a9&pf_rd_r=S5N7PZ197CVMMFMJFC1V&psc=1&refRID=S5N7PZ197CVMMFMJFC1V

https://www.amazon.com/Hibiclens-Antimicrobial-Liquid-Fluid-Ounce/dp/B00HWB8ESU/ref=sr_1_4?crid=1VM5MUGM53GFU&keywords=hibiclens+wash&qid=1581526386&sprefix=hibicl%2Caps%2C250&sr=8-4

According to Clorox, undiluted household bleach has a shelf life of six months to one year from the date of manufacture, after which bleach degrades at a rate of 20% each year until totally degraded to salt and water, and a 1:10 bleach solution has a shelf life of 24 hours.

Thank you for the information.

Sidekick wipes from Striker work well.
And Virex solution.

Our CBRN training recommended wiping down masks/equipment with a 5% bleach solution for biological decon, a 0.5% bleach solution for wiping down personnel/causalities.

Some light bed time reading:
https://www.cs.amedd.army.mil/borden/FileDownloadpublic.aspx?docid=fff442d0-f660-46d9-8a25-729db9d03095

@Seabee_Mech

Thank you for the link. Am definitely going to read it this weekend.

I wanted to bump this thread since the virus is hitting main stream news outlets now. Is 70% Isopropyl still the "go to" for decon of items such as gloves etc? I have to dig up more info on cleaning P100 filters if it gets to that point.

My SO wants to know how to bring up the percentage of alcohol in Dollar ? 50% alcohol.

She has Walmart 91% alcohol.

Incidentally, the Dollar alcohol is in an 8 oz bottle. For a dollar.

She doesn't know what the W-M 91% cost.

H-D has denatured alcohol [ethyl] in one gallon cans for abt $16.

If you mix 50% and 91% you'd have ~70%.

91 is roughly the highest percentage of alcohol that is sanitizing, and 50 is roughly the very lowest. 70% is generally the most effective sanitizer.

No idea what effect the denaturing additive would have in the denatured alcohol.

Some of the reports above seem to say that ethanol is more effective than isopropyl, and that a slightly higher concentration might be better with ethanol.

Hydrogen peroxide is also reported to be effective in that first link. Peroxide and the alcohols are a lot easier to deal with and less damaging to everyday items than bleach, and apparently more effective than bleach as well.

Would be most interested to know what formulation they are talking about of an alcohol-based hand sanitizer that has 4 hours of residual virucidal activity.

Lysol is a phenolic which the one link says to avoid.

A problem that might come up and isn't trivial is that some of these products chemically interact to produce toxic chemical by-products. You really don't want bleach to interact with anything for the most part. Off the top of my head I'm not sure what other interactions might be hazardous. There are some reactions with the phenols but I can't think of what they are off the top of my head.

If the info in the OP is correct I'd probably pick hydrogen peroxide.

Thank you, I'll tell her to mix 50-50.

Also, mixing pool shock and sodium hypochlorite is IIRC, expl bad  ive.

"Would be most interested to know what formulation they are talking about of an alcohol-based hand sanitizer that has 4 hours of residual virucidal activity. "

So would I. I think we will see outlandish marketing claims for all sorts of stuff.

What about denatured alcohol? I imagine that would kill germs... and strip paint.

Soap and warm water?

Pure alcohols are not very effective sanitizers. From those reports it appears that ethanol at between 70 and 80 (maybe 85) percent would be good, so mix 4 to 1 with distilled water. I don't know what effect the denaturing agent would be. There is a reason why alcohol at the drug store is typically 70%.

Ethanol is one of the most effective and convenient sanitizers for covid19, one of the most effective things that gov could do is loosen all the restrictions on it as a temporary measure. Allow untaxed sales of 80% alcohol.

Betadine/povidone iodine and soap is supposed to be very effective against MERS CoV

Idk about this virus though. Alcohol, gloves, and hand sanitizer nowhere to be found but plenty of povidone iodine on the shelves locally.

UV pretty much kills everything

While it's true that sufficient UV kills everything...

I *think* I remember reading that SARS was very UV sensitive, which is likely why it died out. Covid-19 is a derivative/mutation of SARS, so likely similar.

You should check if your city uses UV filtration at their water plant. Mine does. ????

https://www.samsclub.com/p/mmc-sanitizer-128-fl-oz/prod21041136?xid=plp_product_1_17

Is It Effective?

Member's Mark Commercial Sanitizer offers effective sanitizing that kills 99.99% of food service germs. The commercial kitchen sanitizer is EPA registered and approved for use on food contact surfaces. And you don't have to only use this product to clean kitchens, you can use this commercial sanitizer in schools, daycare centers, salons and even in your home. The sanitizer contains 200 parts-per-million (ppm) active quarts for use on food contact surfaces in 500 ppm hard water to protect against: E-coli, Campylobacter jejuni, E-coli 0157:H7, Klebsiella pnemoniae, Listeria monocytogenes, Salmonella enterica, Shigella sonneii, Staphylococcus aureus and Yersinia enterocolitica. The sanitizer also acts as a disinfectant against: human coronavirus, influenza A2, Hong Kong flu virus, norovirus-feline calicivirus and Trichophyton mentagrophytes (athlete's foot fungus). The no-rinse formula can be used on washable, hard, nonporous surfaces like dishes, glassware, eating utensils, kitchen equipment, counters, tables and chairs. The product is also suitable for any USDA-inspected food processing facilities or for federally inspected meat and poultry facilities.

A couple days ago, it was nearly untouched at my local Club while bleach, Lysol (and generic), hand sanitizer, and Clorox wipes (and generic) were completely out of stock.

Attached File