Colorless transparent liquid. It has a special smell of aromatic hydrocarbons. It is a mixture of three isomers of 45-70% m-xylene, 15% to 25% p-xylene and 10% to 15% o-xylene. It is easy to flow and miscible with anhydrous ethanol, ether and many other organic solvents. Xylene has a pungent odor and is flammable. It can be mixed with ethanol, chloroform or ether at will, and is insoluble in water. The boiling point is 137 ~ 140℃. Xylene is a low-toxic chemical and is classified as A4, a substance that lacks evidence of carcinogenicity to humans and animals. Plastics, fuels, rubber, additives to various coatings, adhesives, waterproofing materials, and combustion gases from fuels and tobacco leaves.