"Uses of hydrochloric acid include scale removal in boilers and heat exchangers; neutralization of basic solutions; metals and general cleaning, laboratory procedures, and food processing."
Oh yeah, for burning human flesh.. like if you have a body and you don't want to have the body anymore you can get a 55 large glass tub and fill it with HCl, then dump the body in it and if the molarity is high enough it will eat away most of the body, you can then go pour the acid down the sewer and dump the bones in the woods!