"Not only does this stuff work on biological odors, but it is the ONLY thing I have ever come across, that can eliminate the strong chemical odor of improper dry cleaning! As someone who is highly allergic to many chemicals and odors, this product is great, cause it removes almost all odors, (I haven't come across one it hasn't,) and it leaves no odor after treatment. We've even soaked laundry in a 1/2 to a whole cup of it for about an hour or so, (or more if needed,)before washing it, and the laundry always comes out clean and scent-free! "