An alkyne is a type of hydrocarbon that contains at least one carbon-carbon triple bond. This unique bond gives alkynes their distinct properties, making them more reactive than alkenes and alkanes. The simplest alkyne is ethyne, commonly known as acetylene, which is used in welding and as a fuel. Alkynes can be found in various natural and synthetic compounds. They are important in organic chemistry for creating complex molecules through reactions like hydrogenation and halogenation. Their versatility makes them valuable in industries such as pharmaceuticals and materials science, where they serve as building blocks for more complex structures.