Strongly corrosive, dense, oily liquid.
Very reactive, dissolves most metals; concentrated acid oxidizes, dehydrates, or sulfonates most organic compounds.
Hazard: Strong irritant to tissue.
Use great caution in mixing with water because of heat evolution that causes explosive spattering.
Always add the acid to the water, never the reverse.
Uses: An alkylation catalyst, electroplating baths, iron and steel, lab reagent, non ferrous metallurgy.