Testing Information

Testing Status of Agents at NTP

CAS Registry Number: 1309-64-4

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http://ntp.niehs.nih.gov/go/22124

Selected information from two of the National Library of Medicine's databases: ChemIDPlus1 and HSDB2.

Names (NTP)

  • Antimony trioxide
  • ANTIMONIOUS OXIDE
  • ANTIMONY OXIDE

Structure

Chemical Structure for CAS Registry Number 1309-64-4 from NLM

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Chemical Properties2

Property Description
Color/Form
  • CRYSTALS, POLYMORPHIC
Odor
  • ODORLESS
Taste
  • None found
Boiling Point
  • 1425 DEG C
Melting Point
  • 655 DEG C
Molecular Weight
  • 291.52
Corrosivity
  • None found
Critical Temperature & Pressure
  • None found
Density/Specific Gravity
  • None found
Disassociation Constants
  • None found
Heat of Combustion
  • None found
Heat of Vaporization
  • 17.82 KCAL/MOL
log P (octanol-water)
  • None found
pH
  • None found
Solubilities
  • SLIGHTLY SOL IN WATER, DIL SULFURIC ACID, & NITRIC ACID; SOLUBILITY IN DILUTE HYDROCHLORIC ACID WITH SOLUBILITY INCR WITH INCREASING CONCN OF HYDROCHLORIC ACID. SOL IN SOLN OF ALKALI HYDROXIDES OR SULFIDES, IN WARM SOLN OF TARTARIC ACID OR OF BITARTRATES.
Spectral Properties
  • None found
Surface Tension
  • None found
Vapor Density
  • None found
Vapor Pressure
  • 1 MM HG AT 574 DEG C
Relative Evaporation Rate
  • None found
Viscosity
  • None found
Other Properties
  • At higher temp, the stable form is valentinite which consists of infinite double chains. The orthorhombic modification is metastable below 570 deg C; however it is sufficiently stable to exist as a mineral.
  • Antimony trioxide melts in the absence of oxygen at 656 deg C and partially sublimes before reaching the boiling temp, 1425 deg C. The vapor at 1500 deg C consists largely of ... /two/ molecules of antimony trioxide (Sb4O6), but these dissociate at higher temp to form /single/ SbO3 molecules.
  • Amphoteric
  • DENSITY: 5.2 /SENARMONTITE/; DENSITY: 5.67 /VALENTINITE/
  • HEAT CAPACITY @ 21 DEG C (294.4 DEG K): 24.11 CAL/G-ATOM/DEG C; SUBLIMES AT 400 DEG C IN HIGH VACUUM; EXISTS IN VAPOR PHASE AS SB4O6 (ANTIMONY TRIOXIDE).
  • Temp of transition: 928 deg K; Heat of transition: 14.74 kcal/g mole; Entropy of transition (eu): 15.88; Entropy (eu): 29.4 @ 298 deg K /solid/; Temp of transition: 1698 deg K; Heat of transition: 8.92 kcal/g mole; Entropy of transition (eu): 5.25; Entropy (eu) @ 298 deg K: NA; /Liquid/
  • Colorless cubic crystals /Senarmontite/; white orthorhombic crystals /Valentinite/
  • Index of Refraction: 2.087 /Senarmontite/
  • Index of refraction: 2.18, 2.35, 2.35 /Valentinite/

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Uses2

  • Manufacture of tartar emetic; as paint pigment; in enamels and glasses; as mordant; in flame-proofing canvas.
  • STAINING IRON & COPPER; PHOSPHORS
  • Its principle use is as a flame retardant in textiles and plastics. It is also used as a stabilizer for plastics, as a catalyst, and as an opacifier in glass, ceramics, and vitreous enamels.

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Superlist Classes1

  • Overall Carcinogenic Evaluation: Group 2B
  • Reportable Quantity (RQ) = 1000 lb
  • Exposure by all routes should be carefully controlled to levels as low as possible; Suspected human carcinogen

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Notes (Sources: NTP,HSDB,RTECS,MESH)1

  • None found

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Other Registry Numbers1

  • 10042-99-6
  • 12423-58-4
  • 154396-41-5
  • 178989-93-0
  • 212793-41-4
  • 97048-22-1
  • 97048-23-2

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Synonyms (Sources: NTP, HSDB,RTECS,MESH)1

  • A 1582
  • A 1588LP
  • C.I. 77052
  • C.I. Pigment White 11
  • Amspec-KR
  • Antimonious oxide
  • Antimony(3+) oxide
  • Antimony oxide (Sb2O3)
  • Antimony sesquioxide
  • Antimony trioxide
  • Antimony trioxide production
  • Antimony White
  • Antox
  • AP 50
  • AT 3 (fireproofing agent)
  • Atox F
  • Atox S
  • Chemetron fire shield
  • CI 77052
  • CI Pigment white 11
  • Dechlorane A-O
  • Diantimony trioxide
  • Exitelite
  • Fireshield FSPO 405
  • Flowers of antimony
  • HSDB 436
  • NCI-C55152
  • Nyacol A 1510LP
  • Nyacol A 1530
  • Patox C
  • Patox H
  • Patox L
  • Patox M
  • Patox S
  • Senarmontite
  • Stibiox MS
  • Thermoguard B
  • Thermoguard L
  • Thermoguard S
  • Timonox
  • Timonox White Star
  • Twinkling star
  • Valentinite
  • White star

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Links to Additional Information1

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Footnotes

1 Source: the National Library of Medicine's ChemIDPlus, 10/28/2007.

2 Source: the National Library of Medicine's Hazardous Substance Database, 10/28/2007.

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Web page last updated on May 14, 2008