Low-iron glass typically has a ferric oxide content of about 0.01%. Ordinary plate glass has about 10 times as much iron content. Low-iron glass is made from low-iron silica sand. In the United States, the primary sources for such sand are in Wisconsin.
Fallingwater, a house designed by Frank Lloyd Wright and built in 1939, was one of the first houses to use low-iron glass for windows.
Low iron glass is widely used in solar panels.
Low-iron glass is sold under various brand names. Guardian Industries calls it "UltraClear" or "Ultrawhite". Pilkington calls it "Optiwhite". PPG Industries calls it "Starphire". Other brand names include "Starlite", "Krystal Klear", "Diamant" and "Eurowhite".
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