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PostPosted: Sun Oct 08, 2017 10:58 pm    Post subject: Few interesting things about Arsenic you didn't know Reply with quoteFind all posts by bejoy

Arsenic and its properties:

Arsenic is a chemical compound with atomic number 33 and symbolised as “As”.

Arsenic is a metalloid with various allotropes, the common one are yellow, black and metallic gray, but industries use only gray part the most.

It has metallic grey appearance.

It is the element of group 15 in p-block. Arsenic is of group called pnictogens.

It has boiling point of 614 degree Celsius and melting point of 817 degree Celsius.

Arsenic is insoluble and it has density of 5.72 g/cm3.

Arsenic composes of only one stable isotope and occurs as monoisotopic element in nature.

History and etymology:

Arsenic is known from as earlier as 4th century B.C. The pure arsenic was isolated officially by a German alchemist and a philosopher, Albert Magnus in 1250. Earlier arsenic was added to bronze for increasing its hardness, used as a colourful pigment and in medicines. The word arsenic has its origin from the Persian word zarnikh meaning “yellow”, Greek word arsenikon meaning “masculine”. The Latin word for arsenic is “arsenicum”.

Arsenic Occurrence:

Arsenic is 53rd most plentiful element and earth’s crust comprises of about 1.5 ppm arsenic. It occurs in pure crystalline form in the nature. Arsenic occurs in organic as well as in inorganic forms in the surroundings. Arsenic occurs in minerals like realgar, orpiment and arsenopyrite. China is the top manufacturer of Arsenic followed by Morocco, Russia.

Arsenic applications:

Agricultural use:

It is used as a wood preservative because of its toxicity. Earlier it was used as crop pesticide and for making rodent poison, but in 1980s all these pesticides got banned when government and farmers realized that is was a terrible idea. It is used as feed additive in poultry and production of swine.

Medical use:

Number of arsenics has been used as a medicine during 18th, 19th and 20th centuries. Arsenic trioxide is used in the treatment of cancer over the 500 years. It used for the treatment of patients having acute promyeloctic leukaemia.


The essential use of arsenic is in lead alloying. In car batteries lead components are given strength by very small percentage of arsenic used. In integrated circuits gallium arsenide is an important semiconductor material. Brass dezincification is reduced by adding arsenic.

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