Propyne is a colorless gas that belongs to the group of hydrocarbons known as alkynes. It has the chemical formula C3H4, which means it consists of three carbon atoms and four hydrogen atoms. Propyne is commonly used in industrial applications, such as in the production of chemicals and as a fuel source in welding. This compound is notable for its triple bond between two of the carbon atoms, which gives it unique properties compared to other hydrocarbons. Propyne can be found in natural gas and is also produced during the refining of petroleum. Its reactivity makes it useful in various chemical reactions and synthesis processes.