This is probably the second largest usage of the metal. It is a key element in the processing of nitric acids. It is used in the manufacturing of nitrogen based fertilizers. It is used to make aqua regis, a powerful acid used in the chemical and scientific community. The platinum metals are used in the processing of eyeglasses.
Platinum is the element used to tint the glass used in office buildings.
It is one of the key catalysts used in the petrochemical industry, in processing of unleaded gasoline and jet fuel. Petrochemical usages include the manufacturing of plastics and polyester. It's used to make colored paints. The platinum metals are used extensively in the pharmaceutical industry in the development of anti-cancer and many other drugs. Rhodium, the rarest of the PGMs, is the key catalyst in the processing of Tylanol.