where can i get 3% peroxide? is that the normal stuff they sale for cuts and such??

what about scent free shampoo?? what did you guys use for that?? curious as to how it stands up..have to put it to a test. someone put gasoline on a rag and sprayed some of something on it(oh ya..dead down wind i think..orange bottle with a smiley face) and couldnt smell the gas.. thats good stuff i think..cant find it anywhere and wont pay 10$ shipping on a 15$ item....