Antimony trioxide

Antimony(III) oxide
Antimony(III) oxide
Names
IUPAC name
Antimony(III) oxide
Other names
Antimony sesquioxide
Antimonous oxide
Flowers of Antimony
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.013.796 Edit this at Wikidata
EC Number
  • 215-474-6
KEGG
RTECS number
  • CC5650000
UNII
  • InChI=1S/3O.2Sb checkY
    Key: ADCOVFLJGNWWNZ-UHFFFAOYSA-N checkY
  • InChI=1/3O.2Sb/rO3Sb2/c1-4-3-5-2
    Key: ADCOVFLJGNWWNZ-VTKDZCJOAA
  • O=[Sb]O[Sb]=O
Properties
Sb2O3
Molar mass 291.518 g/mol
Appearance white solid
Odor odorless
Density 5.2 g/cm3, α-form
5.67 g/cm3 β-form
Melting point 656 °C (1,213 °F; 929 K)
Boiling point 1,425 °C (2,597 °F; 1,698 K) (sublimes)
370±37 μg/L between 20.8 °C and 22.9 °C
Solubility soluble in acid
−69.4×10−6 cm3/mol
2.087, α-form
2.35, β-form
Structure
cubic (α) < 570 °C
orthorhombic (β) > 570 °C
pyramidal
zero
Hazards
GHS labelling:
GHS08: Health hazard[1]
Warning[1]
H351[1]
P281[1]
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
2
0
0
Lethal dose or concentration (LD, LC):
7000 mg/kg, oral (rat)
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 0.5 mg/m3 (as Sb)[2]
REL (Recommended)
 TWA 0.5 mg/m3 (as Sb)[2]
Related compounds
Other anions
 Antimony trisulfide
Antimony triselenide
Antimony telluride
Other cations
 Dinitrogen trioxide
Phosphorus trioxide
Arsenic trioxide
Bismuth trioxide
Related compounds
 Diantimony tetraoxide
Antimony pentoxide
Supplementary data page
Antimony trioxide (data page)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

Antimony(III) oxide is the inorganic compound with the formula Sb2O3. It is the most important commercial compound of antimony. It is found in nature as the minerals valentinite and senarmontite.[3] Like most polymeric oxides, Sb2O3 dissolves in aqueous solutions with hydrolysis. A mixed arsenic-antimony oxide occurs in nature as the very rare mineral stibioclaudetite.[4][5]

  1. ^ a b c d Record of Antimony trioxide in the GESTIS Substance Database of the Institute for Occupational Safety and Health, accessed on 23 August 2017.
  2. ^ a b NIOSH Pocket Guide to Chemical Hazards. "#0036". National Institute for Occupational Safety and Health (NIOSH).
  3. ^ Greenwood, N. N.; & Earnshaw, A. (1997). Chemistry of the Elements (2nd Edn.), Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4.
  4. ^ "Stibioclaudetite".
  5. ^ "List of Minerals". 21 March 2011.