Antimony trioxide

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Antimony Trioxide
Names
IUPAC name
Antimony(III) oxide
Identifiers
Jmol-3D images Image
Properties
Sb2O3
Appearance White powder
Density 5.2 g/cm³ α-form, 5.67 g/cm³ β-form
Melting point 656
Boiling point 1425
370 ± 37 µg/L
Solubility Soluble in acids and bases
Hazards
Lethal dose or concentration (LD, LC):
7000 mg/kg, oral (rat)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Antimony trioxide is an oxide of antimony. It is used as a flame retardant in combination with halogenated materials, an opacifying agent in glass and ceramic production, in some special pigment, and as a catalyst.

Properties

Chemical

Antimony(III) oxide is an amphoteric oxide of antimony. It dissolves in acids to form the corresponding acid salts and in sodium hydroxide to form sodium meta-antimonite (NaSbO2).

Sb2O3 + 6 HCl → 2 SbCl3 + 3 H2O

With carbon, antimony trioxide forms elemental antimony.

2 Sb2O3 + 3 C → 3 CO2 + 4 Sb

Physical

Antimony trioxide is an odorless, white solid.

Availability

To do

Preparation

Antimony trioxide can be prepared by reaction of antimony metal with oxygen at high temperatures. This is best done in a furnace. The product will sublime during the process of making it.

Projects

  • Pigment
  • Glass and ceramic production
  • Catalyst for polyethylene terephthalate production

Handling

Safety

Antimony(III) oxide is a suspected carcinogen. It should be handled with care, especially at high temperatures where it tends to sublime.

Storage

Can be stored in any container. Should be stored away from acid and base vapors.

Disposal

To do

References

Relevant Sciencemadness threads