Alloys
Selenium is used with bismuth in brasses to replace more toxic lead. The regulation of lead in drinking water applications such as in the US with the Safe Drinking Water Act of 1974, made a reduction of lead in brass necessary. The new brass is marketed under the name EnviroBrass. Like lead and sulfur, selenium improves the machinability of steel at concentrations around 0.15%. Selenium produces the same machinability improvement in copper alloys. Lithium–selenium batteries
The lithium–selenium (Li–Se) battery is one of the most promising systems for energy storage in the family of lithium batteries. The Li–Se battery is an alternative to the lithium–sulfur battery, with an advantage of high electrical conductivity. Solar cells
Selenium was the basis of the very first solar cells, with the first example of rooftop solar being a selenium cell from 1884. Such cells were later used in battery-free light meters for photography. Copper indium gallium selenide is a material used in solar cells. Photoconductors
Amorphous selenium (α-Se) thin films have found application as photoconductors in flat panel x-ray detectors. These detectors use amorphous selenium to capture and convert incident x-ray photons directly into electric charge. Rectifiers
Selenium rectifiers were first used in 1933. Their use continued into the 1990s. Other uses
Small amounts of organoselenium compounds have been used to modify the catalysts used for the vulcanization for the production of rubber.The demand for selenium by the electronics industry is declining. Its photovoltaic and photoconductive properties are still useful in photocopying, photocells, light meters and solar cells.
Acquired progressive lymphangioma is a group of lymphangiomas that occur anywhere in young individuals, grow slowly, and present as bruise-like lesions or erythematous macules. : 597

See also
List of cutaneous conditions

References


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