What is the chemical formula for rubber?

Rubber has the chemical formula C5H8. It is made primarily of hydrogen and carbon. Rubber regains its original shape after being stretched, and it resists damage from weather.

Rubber is a naturally occurring substance that is also known as gum-elastic. It was named in 1770 by an English chemist because it could erase pencil marks by rubbing it on paper. The first factory to form rubber into molds began in 1820. In 1839, American inventor Charles Goodyear mixed rubber with lead oxide and sulfur. The result was a stronger form of rubber that was used in tires and a variety of rubber products.