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Antimony(III) oxide

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Identification
Molecular formula
Sb2O3
CAS number
1309-64-4
IUPAC name
antimony(3+);oxygen(2-)
State
State

Antimony(III) oxide is a solid at room temperature.

Melting point (Celsius)
656.00
Melting point (Kelvin)
929.00
Boiling point (Celsius)
1 425.00
Boiling point (Kelvin)
1 698.00
General information
Molecular weight
291.52g/mol
Molar mass
291.5180g/mol
Density
5.6700g/cm3
Appearence

Antimony(III) oxide appears as a white, odorless powder. It is often found in a finely divided state. The powder is crystalline, and its appearance can vary slightly depending on the particle size and purity of the sample.

Comment on solubility

Solubility of Antimony(III) Oxide (Sb2O3)

Antimony(III) oxide, with the formula Sb2O3, exhibits unique solubility characteristics that can be fascinating to explore. Its solubility is notably influenced by various factors, including pH levels, temperature, and the presence of complexing agents.

Key Points on Solubility:

  • Water Solubility: Sb2O3 is typically insoluble in water, which means that its dissolution in aqueous solutions is minimal.
  • Solubility in Acids: When introduced to strong acids, such as hydrochloric acid (HCl) or sulfuric acid (H2SO4), the compound may dissolve much more effectively, forming soluble antimony salts.
  • Complex Formation: The presence of specific ligands can enhance solubility. For instance, the coordination with oxalate or citrate can result in increased solubility due to the formation of soluble antimony complexes.
  • Temperature Dependence: Generally, increased temperature can augment the solubility of metals and their oxides in valid solvents, although this effect can vary widely depending on specific conditions.

As with many compounds, the environmental conditions and the chemical form significantly affect the solubility behavior of Sb2O3. Hence, it is essential to consider these aspects in practical applications or research settings.

Interesting facts

Interesting Facts about Antimony Oxide

Antimony, represented as Sb, is a fascinating metalloid element that has been known for its unique properties since ancient times. When reacting with oxygen, it forms antimony oxide, which plays an essential role in various applications. Here are some intriguing facts about this compound:

  • Historical Significance: Antimony has been used since at least 3000 BC, not only as a metal but also in the form of its compounds, particularly in cosmetics, such as kohl.
  • Application in Flame Retardants: Antimony oxide is widely utilized in the production of flame-retardant materials, particularly in plastics and textiles, to enhance safety by reducing flammability.
  • Ceramic Industry: This compound is used as a white pigment in the ceramic industry, providing opacity and aesthetic brilliance.
  • Health Concerns: While antimony has beneficial uses, it can be toxic in certain forms, making safe handling and disposal crucial in industrial applications.

Chemical Properties and Behavior

Antimony oxide has distinctive chemical behavior that can be attributed to the oxidation states of antimony. In its trivalent state, antimony exhibits properties that differentiate it from its pentavalent counterpart:

  • Antimony in its +3 oxidation state behaves as a Lewis acid, capable of accepting electron pairs from bases.
  • The compound often undergoes thermal decomposition under high temperatures, leading to the formation of elemental antimony and oxygen.

Environmental and Safety Considerations

While antimony oxide is valuable in various industries, it is essential to consider its environmental impact. The compound can accumulate in the soil and water systems, raising concerns about potential toxicity to aquatic life. Therefore, understanding the chemical behavior and environmental implications of antimony oxide is crucial for sustainable use.

In summary, antimony oxide is more than just a chemical compound; it is an integral part of our industrial landscape, with applications ranging from safety equipment to art. As you delve deeper into its properties and uses, you'll discover a rich history and a contemporary relevance connected to this versatile symmetric compound.

Synonyms
Diantimony trioxide
ANTIMONY TRIOXIDE
Antimony oxide
Senarmontite
1327-33-9
Antimonious oxide
Valentinite
Exitelite
Timonox
Twinkling star
Antimony White
Thermoguard B
Thermoguard L
Thermoguard S
White star
Fireshield H
Dechlorane A-O
Stibiox MS
Amspec-KR
Patox C
Patox H
Patox L
Patox M
Patox S
Atox B
Atox F
Atox R
Atox S
Antimony oxide (Sb2O3)
FireShield LS-FR
Antimony sesquioxide
Timonox White Star
Microfine A 05
Octoguard FR 10
Flameguard VF 59
Chemetron fire shield
Antimony(3+) oxide
Flame Cut 610
Flame Cut 610R
Antimony Bloom 100A
Antimony Bloom 500A
Weisspiessglanz
Nyacol A 1510LP
Fireshield FSPO 405
LS-FR
Nyacol A 1530
Weisspiessglanz [German]
AP 50 (metal oxide)
NCI-C55152
AT 3 (fireproofing agent)
EINECS 215-474-6
AT 3B
MIC 3
CCRIS 4495
HSDB 436
LSB 80
HM 203P
AP 50
A 1588LP
ANTIMONIUM OXYDATUM
EINECS 215-175-0
AN 800
Antimony oxide (SB203)
P217481X5E
Sb2O3,
CI 77052
ANTIMONY TRIOXIDE [MI]
ANTIMONY TRIOXIDE [HSDB]
ANTIMONY TRIOXIDE [IARC]
C.I. 77052
UNII-P217481X5E
A 1582
ANTIMONIUM OXYDATUM [HPUS]
Weisspiessglanz (German)
EC 215-175-0
ANTIMONY TRIOXIDE (IARC)
Anzon-tms
Dechlorane AO
Antimony peroxide
Ultrafine II
FireShield LSFR
oxostibanyl stibinate
STIBITAL
PATOX U
WHITE STAR N
TIMONOX RED STAR
FIRE CUT AT 3
POLYSAFE 100T
UF (OXIDE)
TRUTIN 40
PYROGUARD AN 700
PYROGUARD AN 900
DTXCID303880
ANTIMONY OXIDE (O3SB2)
DTXSID9051456
FCP 100
ANTIMONY OXIDE (SBO1.5)
ANTIMONY TRIOXIDE (SB2O3)
A1588 LP
215-474-6
1314-60-9
1332-81-6
a1530
a1582
antimony(iii) oxide
antox
blue star
dtxsid4023880
einecs 215-576-0
extrema
antimony(3+);oxygen(2-)
oxygen(-2) anion
12412-52-1
Nyacol A-1530
AKOS030228225
Q409035
1317-98-2