Polyvinyl chloride, also known as polyvinyl chloride or by its corresponding abbreviation PVC, is the polymer of vinyl chloride. It is the most important polymer in the series obtained from vinyl monomers and is one of the most widely consumed plastics in the world.

Pure, it is a rigid material; it owes its application versatility to the fact that it can also be mixed in high proportions with plasticizing products, such as phthalic acid esters, which make it flexible and moldable or with inorganic compounds. It is considered stable and safe in technological applications, at room temperature, but extremely dangerous if burned or heated at high temperatures and in unsuitable facilities, due to the presence of chlorine in the molecule, releasable as HCl with the possibility of dioxin formation, or by release of the monomer. Recyclable plastic, SPI-coded – resin identification coding system 3, is partially recovered due to problems of high processing costs, in development the Vinyloop technique.