Arsenic, atomic no.: 33, symbol as As, weight at 74.92160, arsenic occurs in two solid modifications: yellow, and grey or metallic, with specific gravities of 1.97, and 5.73, respectively. The element is a steel grey, very brittle, crystalline, semimetallic (metalloid) solid. It tarnishes in air, and when heated rapidly oxidises to arsenous oxide which has a garlic odour.
Arsenic and its compounds are poisonous as any reader of "who-done-it" books knows. Upon heating arsenic and some minerals containing arsenic, it sublimes (transfers from the solid to the gaseous state, without passing through the liquid state).
Arsenic is found in nature in a number of minerals including realgar (As4S4), orpiment (As2S3), arsenolite (As2O3), and iron minerals such as arsenopyrite (FeAsS) and loellingite (FeAs2). Arsenic is made on an industrial scale by heating appropriate minerals in the absence of air. The arsenic is condensed out as a solid. FeAsS (700°C) → FeS + As(g) → As(s)
Products available
Product Name
Formula
Grade
Description
Applications
Arsenic Metal
As
99%
metallic grey
Alloy;
Semiconductor;
Reagent
Standard Specifications
Arsenic Metal is mainly used in the alloy of Lead and Copper, to improve the corrosion resistivity and abrasion resistivity; and used in producing semiconductor GaAs, LED, and different kinds of Arsenic reagent etc.
Code
As
S
Sb
Bi
Cu
Ag
Total
(%) min.
(ppm) max.
As-2N
99
0.30
0.40
0.10
0.05
0.05
1.0
33
As
74.92
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