Tuesday, February 5, 2008

How to Remove Cat Urine Odor Using a Free Homemade Recipe

By Sandy Stone

Last year we purchased a home that been soiled by the previous owners' cat. We thought that having the carpets professionally cleaned would take care of it but it just made the problem worse.

After using several well-advertised and expensive cat urine removal products that didn't work, I was searching on the web for a solution and found a homemade remedy that uses three simple household products. Desperate I tried it and wouldn't you know it - it worked!

So well that I had to find out why and researched the chemistry and origins of the recipe. I found out it was developed originally by a chemist for neutralizing the proteins in skunk odor, which are the same proteins found in cat urine and give it it's horrible smell!

Cat urine is not much different from any other urine, be it human or other animals. It is made up urea, creatinine, uric acid, sodium and other electrolytes. When cat urine dries the urea gets broken down by bacteria which gives it that distinctive ammonia smell. As it decomposes further it releases thiols which make the cat urine odor worse yet.

The recipe works because the reaction of hydrogen peroxide and baking soda produces large amount of oxygen. The oxygen molecules bond to the thiols, breaking them up into carbon dioxide and ammonia, that evaporates quickly thereby effectively neutralizing the thoils and their foul-smelling odor.


  • 1 quart of 3% hydrogen peroxide

    1/4 cup baking soda

    1 teaspoon of liquid soap
Gently mix all ingredients in a non-metal container. Do not mix or shake vigorously!

The mixture is best used when fresh but can be stored. Do not keep mixture in an airtight container as baking soda and hydrogen peroxide when mixed together release loads of oxygen. We don't want an explosion on our hands on top of the mess we already have!

I mix and keep mine in a large spray bottle I bought from Home Depot but on old plastic liter soda bottle works just a well. Just remember to keep the cap on loose.

3% hydrogen peroxide can be bought at most grocery and drug stores in pint and quart bottles.

A word of caution:

Surfaces that are porous may swell e.g. drywall, wood flooring, particle board, etc. with application of this recipe. But if your surface is already ruined by cat urine and you want to get rid of the odor until you can replace it - give it a try.

Always test for color-fastness when using first. Apply to a small area and wait 24-48 hours until dry before using on an entire area. Hydrogen peroxide is a bleaching agent in stronger concentrations (think teeth whiteners) and can lighten materials that are not color-fast.

For specific applications and details on how to use the recipe for carpets, sofas, mattresses, comforters, hardwood floors and many other things, please visit http://www.remove-cat-urine.com

ASPCA Day is April 10

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