| Product description : |
Arsenic Trioxide
Another name: arsenous anhydride; White arsenic
(Molecular) formula: As2O3
(Molecular) weight: 197.84
UN NO.: 1561
Hazard class NO.: 6.1
Pack Group: Ⅱ
Physical and chemical nature:
Odourless. White powder or crystal. Three crystal shapes: monoclinic crystal,cubic crystal and amorphous crystal. Among them, monoclinic crystal sublimates at 193℃,with a relative density of 4.15;of cubic crystal the relative density is 3.865;while amorphous crystal 3.738,has a melting point of 312.3℃.Arsenic trioxide dissolves a little in water and generates in to the relative acid. Monoclinic and cubic crystals dissolve in ethanol, acids and alkalis; amorphous crystal dissolves in acids and alkalis, but insolubilizes in ethanol,acids and alkalis;amorphous crystal dissolves in acids and alkalis,but insolubilizes in ethanol.The foreign matters contained in their industrial products are different, appearing subtle red, grey or yellow.
Usage:
Used to refine the element arsenic. It is the material for the smelting of arsenic alloy and the manufacture of semiconductor. In the glass industry it is used as a clarificant and a decolorant to improve the translucency of glass products. In the leather industry it is used to make sodium nitrite, a leather preservative. In agriculture it is used as a disinfectant and a rust inhibitor for insect prevention, and also the material of other arsenic-containing pesticides. Otherwise, it is applied in the manufacture of dyes and paints, gas desulfurization, wood corrosion prevention, boiler scale prevention and the production of ceramic and enamel. Also used as a chemical reagent.
Quality standard:
Index name Index
First grade Second grade Third grade
As2O3, % ≥ 99.0 97.0 93.0
Whiteness degree 70 55 30
Fineness,mesh(rate of passage≥98% 60 40 40
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