a thinner for paint, and an ingredient in paints and varnishes.0.62 ppb1.87 ppbNo10000 ppbNo10000 ppbMethyl ethyl ketoneMethyl ethyl ketone is a synthetic chemical used as a solvent for paints, coatings, adhesives, printing inks, and other industrial and consumer goods; it occurs naturally in some vegetation and forms during ozonation of drinking water. 3.07 ppb9.2 ppbNo4000 ppbLegal at any level