Heavy-duty disinfecting the non-toxic way with hydrogen peroxide and vinegar

Heavy-duty disinfecting the non-toxic way with hydrogen peroxide and vinegar:
Color-enhanced scanning electron micrograph showing Salmonella typhimurium (red) invading cultured human cells
Credit: Rocky Mountain Laboratories, NIAID, NIH

The comments on yesterday's post indicated some general interest in strong disinfectants, and questions as to whether vinegar really was a good disinfectant. Vinegar is an acid and as such it does kill wee beasties, though not as many wee beasties as the nuclear options such as bleach or Lysol will. For everyday use, I think vinegar does a fine job. But I admit there are times, like when you're cleaning chicken juice off a cutting board, where you might want something stronger.

Here's a safe, super-strong way to disinfect. We covered it in The Urban Homestead, and it floats around the interwebs, too, so it may be review for some of you.

1) Take a bottle of hydrogen peroxide (3% solution, the kind you buy in the drugstore). Leave it in the brown bottle it comes in because hydrogen peroxide is light sensitive. Screw a spray bottle nozzle onto the brown bottle.

2) Fill another spray bottle with undiluted white vinegar.

3) Mist the surface you wish to disinfect with one spray bottle first, and then the other, immediately after, like a one-two punch. Do not combine the two liquids in one bottle for the sake of efficiency. That doesn't work. It makes a new chemical altogether which is not effective for this. Keep them separate. Always apply in the form of mist.

This methodology was developed in the mid-90's by Susan Sumner a food scientist at Virginia Polytechnic Institute. She actually developed this technique to remove salmonella from the surface of meat and vegetables. Yes, it can be applied directly to the food! I gather you rinse it off after application. It is said not to leave lingering flavors, but I haven't tried it.

This combo works like gangbusters at killing salmonella. Nothing else works better. The magic is in the mix, somehow. As Sumner told Science News Online,

"If the acetic acid got rid of 100 organisms, the hydrogen peroxide would get rid of 10,000, and the two together would get rid of 100,000."

This one-two punch spray is very effective at killing germs of all sorts wherever it meets them, not just on food, so you can use it in on your cutting boards, in the bathroom, in garbage cans...wherever you need the extra assurance. And it's so safe, it's edible.

So no more excuses for clinging to your bleach, people. Ditch the poison!