Platinum is a chemical element with symbol Pt and atomic number 78. It is dense, malleable, ductile, highly unreactive, precious, gray-white transition metal.
P 3537 (OTTO) Platinum sputtering target, 99.99% (bonded with Copper backing plate) - used to make weights and measures standards, electronics industry for electrical contacts, and it is used to manufacture electrodes, manufacture jewelry and also used as catalyst.