Arsenic

A shiny gray element with atomic symbol As, atomic number 33, and atomic weight 75. It occurs throughout the universe, mostly in the form of metallic arsenides. Most forms are toxic. According to the Fourth Annual Report on Carcinogens (NTP 85-002, 1985), arsenic and certain arsenic compounds have been listed as known carcinogens. (From Merck Index, 11th ed)

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Tree Number(s): D01.268.513.249

MeSH Unique ID: D001151

Registry Number: N712M78A8G

Entry Terms:

• Arsenic-75
• Arsenic 75

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Chemicals and Drugs Category
Inorganic Chemicals
Elements
Metalloids
Arsenic