I found this under the sink in my college's stockroom and it has 6M HCl + Acetone in it, presumably as the only ingredients. I tried to research any potential reactions and found none, save for any hydrogen peroxide being added in it (do not google unless you wanna end up on a list).

Anyway, I know I should neutralize it with some sodium carbonate, but then what? I can't just throw it down the drain and I don't have any OSHA carboys. What to do with it?