Diantimony pentoxide Chemical Properties

Melting point:

380 °C (dec.)(lit.)

Density 

3.78 g/mL at 25 °C(lit.)

form 

Powder

Specific Gravity

3.8

color 

Yellow

Water Solubility 

Slightly soluble in water. Slowly dissolves in warm HCl and warm KOH. Insoluble in HNO₃

Merck 

14,698

crystal system

Monoclinic

Space group

C2/c

Lattice constant

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
1.2646	0.4782	0.54247	90	103.91	90	0.3184

Exposure limits

ACGIH: TWA 0.5 mg/m3
NIOSH: IDLH 50 mg/m3; TWA 0.5 mg/m3

Stability:

Stable. Incompatible with acids, reducing agents.

CAS DataBase Reference

1314-60-9(CAS DataBase Reference)

EPA Substance Registry System

Antimony oxide (Sb2O5) (1314-60-9)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36

RIDADR 

1549

WGK Germany 

3

RTECS 

CC6300000

TSCA 

Yes

HazardClass 

6.1

PackingGroup 

III

Toxicity

LD50 i.p. in rats: 400.0 mg Sb/100 g (Bradley, Fredrick)

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

Diantimony pentoxide Usage And Synthesis

Chemical Properties

yellow powder

Physical properties

Yellow powdery solid; density 3.80 g/ cm³; very slightly soluble in water; hydrated pentoxide is insoluble in nitric acid; dissolves in an aqueous solution of caustic potash.

Uses

It is used as flame retardants in acrylonitrile-butadiene-styrene (ABS) polymer, plastics, rubbers, paper and textiles. It finds use as a flocculant in the production of titanium dioxide. It also finds use in ion-exchange resin. It is also employed as catalyst in certain polymerization and oxidation reactions.

Uses

Antimony pentoxide (Sb2O3) is used as a flame retardant for textile materials and as a source to prepare other antimony compounds.

Uses

Fire retardant in clothing.

Definition

A yellow solid. It is usually formed by the action of concentrated nitric acid on antimony or by the hydrolysis of antimony(V) chloride. Although an acidic oxide, it is only slightly soluble in water.

Preparation

The hydrated oxide is prepared by hydrolysis of antimony pentachloride; or by acidification of potassium hexahydroxoantimonate(V), KSb(OH)₆ [12208- 13-8]. The product, filtered and air dried at ambient temperature has approximate composition Sb₂O₅ ? 3.5H₂O. It may be also prepared by oxidation of antimony trioxide with nitric acid.

Flammability and Explosibility

Non flammable

Safety Profile

Moderately toxic by intraperitoneal route. See also ANTIMONY COMPOUNDS.

Diantimony pentoxide(1314-60-9)Related Product Information

• Calcium hydroxide
• Calcium oxide
• Glutaric anhydride
• Trimellitic Anhydride
• Chromium(VI) oxide
• CIS-BUTENEDIOIC ANHYDRIDE
• Magnesium oxide
• Phthalic anhydride
• Succinic anhydride
• Zinc oxide
• ANTIMONY (IV) OXIDE
• Antimony
• Tellurium dioxide
• Acetic anhydride
• ARSENIC PENTOXIDE
• Vanadium(V) oxide
• Diantimony trioxide
• Hydrogen peroxide