Chemicals can be bought in Pittsburgh. These are compounds prepared artificially and used for their reactive nature. They can be used in lab supplies, science projects, etc. Bulk chemical supplies may also be available though it may not be for individual sales. Chemicals are used in many different industries. It converts many raw materials into usable end products. Among the most well known chemicals are polymers and plastics, notably polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, polystyrene and polycarbonates. Chemicals are also used in manufacture of pharmaceuticals, diagnostics, animal health products, vitamins, and pesticides, along with soaps, detergents, cosmetics and dyes.