This arene, also known as mesitylene, presents as a colorless to almost colorless, sweet-smelling liquid. It is known to be miscible in benzene and acetone but insoluble in water. Store in a cool, dark and well-ventilated place at ambient temperatures. 1,3,5-Trimethylbenzene is incompatible with oxidizing agents and strong acids and should not be stored or handled in their vicinity. This chemical is flammable in liquid and vapor form.