Acheron stepped in Hydrogen Peroxide

About a half hour ago I had to pull Acheron out of the cabinet below the bathroom sink and in the process he knocked over a bottle of Hydrogen Peroxide which spilled. I didn't see it when I set him down and may have put at least one of his paws into it. As soon as I saw the puddle I locked him out of the room while I cleaned it up, then put some water into the kitchen sink and set him into it. He fought but all of his paws got into the water and then I dried them off. 

Should I be worried about any bad effects of the peroxide?

did he ingest any? hydrogen peroxide on unbroken skin is not a problem. it does have a bleaching effect, so it may stain/lighten the fur. 

hydrogen peroxide is used to induce vomiting in cats. so, if that happens, it's expected. 

I use hydrogen peroxide as a tooth cleaner...   It's not particularly dangerous, but you would never put it on an open wound.

You did the right thing, rinsing it off, just to be safe.   

No, he didn't ingest any but that was my biggest worry. I was afraid it might be toxic to cats and if he had any on his feet he might lick it off and get sick.

Some people drink the stuff on purpose :tongue2:. Not that I recommend it but clearly it's not toxic. It can be irritating and a certain amount will cause vomiting (too many bubbles in the stomach, up it comes!) but a small amount should be entirely harmless. Once the extra oxygen bubbles away it's just water.

Drinking it on purpose should only be done with food grade, though (because of potential impurities). H2O2 externally can cause burns, but since you rinsed it off immediately (and since it was probably a low percentage of 3%), that shouldn't be a worry. (The burns can be like bleach burns, if you've ever gotten undiluted bleach on your hands: immediate dead dry skin, kind of itchy, not too terribly painful.) To make a cat vomit, you need a pretty significant quantity (something around a teaspoon, enough to make a lot of foam), not an amount your cat would have licked off his paws before you rinsed him off.