| Arsenic
Trioxide
Another
name: arsenous anhydride;white arsenic
(Molecular)Formula:
As2O3
UN.NO: 1561
HAZARD CLASS : 6.1
H.S.CODE:
2811:2900
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°C,with arelative density
of 4.15;of cubic crystal the relative density is 3,865;while
amorphous crystal 3.738,has a meling point of 312.3°C.Arsenic
trioxide dissolve a little in water and generate inot
the relative acid.Monoclinic and cubic crystals dissolve
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.
Introduction:
Vsed to reine the element arsenic.It is the
material for the smelting of arsenic alloy and the manufacture
of semiconductou.In the glass industry it is used as
a clarificant and a decolorant to imporve 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,if 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 |
Chemical
composition |
First
grade |
Second
grade |
Third
grade |
| As2O3,%≥ |
99.0 |
97.0 |
93.0 |
| Whiteness,degree
%≥ |
70 |
55 |
30 |
| Fineness,item(Rate
of passage ≥98%) |
60 |
40 |
40 |
Package,storage
and transportation: Packed in a wood box lining
with two layered firm paper containers or polythylene
plasticbags,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.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
leking.It must be arefully supervised.After every use,all
those present must change their clothes immediately,wash
their hands thououhgly an avoid eating.
|
