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.
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.
|Whiteness degree ≥
|Fineness,mesh(rate of passage≥98%
Package, storage and transportation:
Packed in a wood box lining with two layered firm paper
containers or polyethylene plastic bags, binded with iron wires
or sheets. The net weight per box is 50kg.On the package it
should be clearly marked "deadly poisonous product".
It is an inorganic deadly poison, with a dangerous standard
serial number:81008. It should be stored in an aeration-drying
storehouse. The vessels must be sealed up and kept separate
from edible materials, preserving it from damp air and leaking.
It must be carefully supervised. After every use, all those
present must change their clothes immediately, wash their hands
thoroughly and avoid eating.
In case of fire, it can be put out by water and sandy loam.