What is the chemical formula of polyurethane?

Polyurethane's chemical formula is written as C₂₅H₄₂N₂O₆. It is a polymer that forms foam.

Polyurethane is used in many common everyday items. Car seats are polyurethane cushions surrounded by a fabric or leather cover. Chair or seat cushion polyurethane foam is dense and sturdy, but it can be made to be as soft and supple as in a bed pillow. Carpet padding can be polyurethane as well, which is made into thin layers.

When making foam cushions, polyurethane starts out as a liquid that is easily poured into molds. The molds are fashioned into whatever custom shape is needed for a particular item.