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Arsenic , As
Arsenic is a chemical element that has the symbol As and atomic number 33. Arsenic was first written about by Albertus Magnus (Germany) in 1250. Its Atomic Mass is 74.92. Its Ionic Charge is (3-) Its position in the periodic table is shown at right. This is a notoriously poisonous metalloid that has many allotropic forms: yellow (molecular non-metallic) and several black and gray forms (metalloids) are a few that are seen. Three metalloidal forms of arsenic with different crystal structures are found free in nature (the minerals arsenic sensu stricto and the much rarer arsenolamprite and pararsenolamprite), but it is more commonly found as arsenide and arsenate compounds. Several hundred such mineral species are known. Arsenic and its compounds are used as pesticides, herbicides, insecticides and various alloys.
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Custom EnquiryAs Pieces 2-6mm 99.999% Pure
Arsenic Metal
UN1558 6.1 PG II
As2O5 Pieces 12mm & smaller (sintered) 99.999% Pure
Arsenic Oxide
UN1559 6.1 PG II
As2O5 Pieces 12mm & smaller (sintered) 99.9% Pure
Arsenic Oxide
UN1559 6.1 PG II
As2Se3 Pieces 1-6mm (melted) 99.999% Pure
Arsenic Selenide
UN1557 6.1 PG II
As2Se3 Pieces 1-6mm (melted) 99% Pure
Arsenic Selenide
UN1557 6.1 PG II
As2S3 Pieces 1-6mm (melted red) 99.9% Pure
Arsenic Sulphide
UN1557 6.1 PG II
As2Te3 Pieces 3-12mm (melted) 99.999% Pure
Arsenic Telluride
UN1557 6.1 PG II
As2Te3 Pieces 3-12mm (melted) 99% Pure
Arsenic Telluride
UN1557 6.1 PG II
As2Te3 Pieces 1-6mm (melted) 99.999% Pure
Arsenic Telluride
UN1557 6.1 PG II
As Pieces <20mm 99.999% Pure
Arsenic Metal
UN1558 6.1 PG II
As2Te3 Pieces 3-8mm 99.999% Pure
Arsenic Telluride
UN1557 6.1 PG II
As2O3 -100 Mesh 99.99% Pure
Arsenic Oxide
UN1561 6.1 PG II
As2O3 -100 Mesh 99.9% Pure
Arsenic Oxide
UN1561 6.1 PG II
As2Se3-325 Mesh (typ. =10 microns 99.99% Pure
Arsenic Selenide
UN1557 6.1 PG II
As2S3 -325 Mesh 99.999% Pure
Arsenic Sulphide
UN1557 6.1 PG II
As2S3 -325 Mesh (yellow) 99.9% Pure
Arsenic Sulphide
UN1557 6.1 PG II
As2Te3 -325 Mesh (typ. =10 microns) 99.999% Pure
Arsenic Telluride
UN1557 6.1 PG II
As2Te3 -325 Mesh (typ. =10 microns) 99% pure
Arsenic Telluride
UN1557 6.1 PG II
As2S3 -100 Mesh 99.999% Pure
Arsenic Sulphide
UN1557 6.1 PG II
Arsenic Telluride As2Te3, Available purity 99.999%
Arsenic Telluride-Copper As2Te3-Cu 1 at%, Available purity 99.999%
Arsenic sulphide As2S3, Available purity 99.99%
As2Te3 - Cu 1 at% TRG 3" dia. x 0.250" Tk 99.999% Pure
Arsenic Telluride-Copper
As2S3 TRG 25.4mm dia x 6.35mm Tk 99.99% Pure
Arsenic Sulphide
The most common oxidation states for arsenic are -3 (arsenides: usually alloy-like intermetallic compounds), +3 (arsenates(III) or arsenites, and most organoarsenic compounds), and +5 (arsenates(V): the most stable inorganic arsenic oxycompounds). Arsenic also bonds readily to itself, forming, for instance, As-As pairs in the red sulfide realgar and square As43- ions in the arsenide skutterudite. In the +3 oxidation state, the stereochemistry of arsenic is affected by possession of a lone pair of electrons.