ASARCO LLC engages in mining, smelting, and refining copper and other metals. It offers copper rods, copper cakes, and copper cathodes. The company also provides bismuth selenide, which is used to produce lead-free brass; and tellurium, which is used in the rubber and chemical industries. ASARCO LLC was founded in 1899 and is based in Tucson, Arizona with copper mines, copper smelters, SX/EW plants, and administrative offices in Arizona. It has a copper refinery in Texas. As of December 9, 2009, ASARCO LLC operates as a subsidiary of Americas Mining Corporation.