Can cats be poisoned by soap?

Why do you ask? Do you want to poison a cat?

Soap probably won't though. But don't poison a cat if that's what you're doing.

Oh no, I'm definitely not poisoning a cat. It's just that I sometimes find my cat eating hand soap and I stop her, but I just wanted to make sure it isn't poisonous.

Oh, okay. Just that maybe your cat will get a little sick.