Density
5.727 g/cm³ (at 20 °C)
Melting Point
817 °C (sublimes)
Boiling Point
615 °C (sublimes)
Discovery
Arsenic was known in ancient times. Its toxic nature was recognized early on.
Common Uses
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Wood preservation (as copper chromated arsenic - CCA)
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Production of certain alloys
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Semiconductor applications (e.g., gallium arsenide)
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Used in some pesticides and herbicides (though increasingly restricted)
Interesting Facts
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Arsenic and its compounds are highly toxic.
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Historically used as a poison.
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Exists in several allotropic forms; the most common is a gray, metallic-looking solid.
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Gallium arsenide is an important semiconductor material used in lasers and LEDs.
Back to Periodic Table