Sub-Product

Acetylene is the chemical compound with the formula C₂H₂ and structure H−C≡C−H. It is a hydrocarbon and the simplest alkyne. As an alkyne, acetylene is unsaturated because its 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°.

This colorless gas is widely used as a fuel and a chemical building block. It is unstable in its 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 such as divinyl sulfide and phosphine.

Source: Wikipedia, Acetylene