Acetylene(systematic name:ethyne) is the chemical Compound with the formula C2H2. It is a hydrocarbon and the simplest alkyne. This colorless gas is widely used as a fuel and a chemical building block. It is unstable in pure form and thus is usually handled as a solution. Pure acetylene is odorless, but commercial grades usually have a marked odor due to impurities. Acetylene is unsaturated because it’s two carbon atoms are bonded together in a triple bond. The carbon–carbon triple bond places all four atoms in the same straight line, with CCH bond angles of 180°. Discover Acetylene was discovered in 1836 by Edmund Davy, who identified it as a "new carburet of hydrogen At atmospheric pressure, acetylene cannot exist as a liquid and does not have a melting point. The adiabatic flame
temperature in air at atmospheric pressure is 2534 °C. Acetylene gas can be dissolved in acetone or dimethyl formamide in room temperature and 1 atm. An important reaction of acetylene is its combustion, the basis of the acetylene welding technologies. Otherwise, its major applications involve its conversion to acrylic acid derivatives with carbon monoxide to give acrylic acid, or acrylic esters, which can be used to produce acrylic Glass.