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Diantimony trioxide CAS#1309-64-4

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  • Diantimony trioxide CAS#1309-64-4
  • Diantimony trioxide CAS#1309-64-4
  • Diantimony trioxide CAS#1309-64-4
  • Diantimony trioxide CAS#1309-64-4
  • Diantimony trioxide CAS#1309-64-4

›

Diantimony trioxide CAS#1309-64-4

Dual Crystal Forms：Available in orthorhombic (valentinite) and cubic (senarmontite) structures, offering stable physical properties for diverse industrial applications.


High Thermal Stability：Melts at 656 °C and sublimes at elevated temperatures, ensuring reliable performance in high-temperature processing and refining operations.


Excellent Chemical Resistance：Practically insoluble in water and organic solvents, while readily soluble in acids and alkalis, enabling controlled reactivity in chemical formulations.


High Purity Optical Properties：High refractive index (2.087) and well-defined molecular structure (Sb₂O₆ dimers) support use in specialty glass, ceramics, and catalyst systems.



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Product Description

Product Description of ‌Diantimony trioxide CAS#1309-64-4

Antimony trioxide: orthorhombic (valentinite, 5.67 g/cm³) or cubic (senarmontite, 5.20 g/cm³, dimeric Sb₂O₆). Refractive index 2.087; mp 656 °C (O₂-free); bp 1550 °C (sublimes); sublimes at 400 °C (vacuum). Very slightly soluble in water, insoluble in organics; soluble in HCl, caustic alkalis and tartaric acid.


Product Application of Diantimony trioxide CAS#1309-64-4

Diantimony trioxide is a key flame-retardant additive for plastics. Industrial grades (99.0–99.9% purity) are produced by oxidizing antimony metal/sulfide ores at 600–800 °C, with particle size controlled via processing. Also used as a white pigment; fine particles maximize whiteness/opacity, coarse grades for translucent plastics. Insoluble in water, low moisture loss.


Product Information

Parameters


Melting point655 °C (lit.)
Boiling point1550 °C (lit.)
bulk density800-1300kg/m3
density5.2
vapor pressure13.3 hPa (660 °C)
Fp1550°C subl.
storage temp.Store below +30°C.
solubility2.70mg/l
formpowder
colorWhite
Specific Gravity5.67
Odorwh. cubic or orthorhombic cryst., odorless
biological sourcerabbit
Water SolubilitySlightly soluble. <0.1 g/100 mL at 20 ºC
crystal systemCube
Merck14,711
Space groupFd3m
Lattice constanta/nmb/nmc/nmα/oβ/oγ/oV/nm31.1141.1141.1149090901.3825
Exposure limitsACGIH: TWA 0.5 mg/m3
NIOSH: IDLH 50 mg/m3; TWA 0.5 mg/m3
Stability:Stable.
InChIKeyMUBFITUCTVFSOJ-UHFFFAOYSA-L
CAS DataBase Reference1309-64-4(CAS DataBase Reference)
IARC2B (Vol. 47) 1989
NIST Chemistry ReferenceAntimony trioxide(1309-64-4)
EPA Substance Registry SystemAntimony trioxide (1309-64-4)


Safety Information
Hazard CodesXn,Xi,T
Risk Statements40-61
Safety Statements22-36/37-45-53
RIDADR1549
WGK Germany2
RTECSCC5650000
Hazard NoteIrritant
TSCAYes
HazardClass6.1
PackingGroupIII
HS Code28258000
Hazardous Substances Data1309-64-4(Hazardous Substances Data)
ToxicityLD50 orally in rats: >20 g/kg (Smyth)


Safety Information


Hazard CodesXn,Xi,T
Risk Statements40-61
Safety Statements22-36/37-45-53
RIDADR1549
WGK Germany2
RTECSCC5650000
Hazard NoteIrritant
TSCAYes
HazardClass6.1
PackingGroupIII
HS Code28258000
Hazardous Substances Data1309-64-4(Hazardous Substances Data)
ToxicityLD50 orally in rats: >20 g/kg (Smyth)


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