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1314-32-5

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Basic Information
CAS No.: 1314-32-5
Name: Thallium(III) oxide
Molecular Structure:
Molecular Structure of 1314-32-5 (Thallium(III) oxide)
Formula: O3Tl2
Molecular Weight: 456.74
Synonyms: Dithalliumtrioxide; Thallic oxide; Thallium oxide; Thallium oxide (2:3); Thalliumsesquioxide; Thallium trioxide; Thallium(3+) oxide; Thallium(III) oxide
EINECS: 215-229-3
Density: 9,65 g/cm3
Melting Point: 717 °C(lit.)
Boiling Point: 875°C
Flash Point: °C
Hazard Symbols: As for thallium.
Risk Codes: 26/28-33-51/53
Safety: Poison by ingestion, intraperitoneal, and intravenous routes. Combustible by chemical reaction. Evolves O2 @ 875°. Mixtures with sulfur or antimony trisulfide explode when ground. Hydrogen sulfide ignites and may explode weakly on contact with the oxide. When heated to decomposition it emits toxic fumes of Tl. See also THALLIUM COMPOUNDS.
Transport Information: UN 1707 6
PSA: 43.37000
LogP: -0.30600
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Chemistry

Molecular Structure:

Molecular Formula: O3Tl2
Molecular Weight: 456.7648
IUPAC Name: Oxo(oxothallanyloxy)thallane
Synonyms of Thallium(III) oxide (CAS NO.1314-32-5): Dithallium trioxide ; EINECS 215-229-3 ; HSDB 6055 ; Thallium oxide (Tl2O3) ; Thallium peroxide ; Thallium sesquioxide ; Thallium(3+) oxide ; Thallic oxide ; Thallium oxide (8CI,9CI) ; Thallium oxide (Tl2O3) ; RCRA waste no. P113 ; Thallium oxide Tl2O3
CAS NO: 1314-32-5
Classification Code: Reportable Quantity (RQ) = 100 lb
Melting point: 717 °C 
H bond acceptors: 3
Freely Rotating Bonds: 2
Polar Surface Area: 43.37 Å2

Uses

 Thallium(III) oxide (CAS NO.1314-32-5) is metallic with high conductivity and is a degenerate n-type semiconductor which may have potential use in solar cells.

Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
dog LDLo oral 34mg/kg (34mg/kg)   American Industrial Hygiene Association Journal. Vol. 21, Pg. 399, 1960.
guinea pig LDLo intraperitoneal 34mg/kg (34mg/kg)   American Industrial Hygiene Association Journal. Vol. 21, Pg. 399, 1960.
guinea pig LDLo oral 5200ug/kg (5.2mg/kg) BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD

GASTROINTESTINAL: OTHER CHANGES

BLOOD: HEMORRHAGE
"Metal Toxicity in Mammals, Vol. 2: Chemical Toxicity of Metals and Metalloids," Venugopal, B., and T.D. Luckey, New York, Plenum Press, 1978Vol. 2, Pg. 101, 1978.
mouse LD50 intraperitoneal 40mg/kg (40mg/kg)   Current Toxicology. Vol. 1, Pg. 39, 1993.
rabbit LDLo intraperitoneal 67mg/kg (67mg/kg)   American Industrial Hygiene Association Journal. Vol. 21, Pg. 399, 1960.
rabbit LDLo intravenous 44mg/kg (44mg/kg)   American Industrial Hygiene Association Journal. Vol. 21, Pg. 399, 1960.
rabbit LDLo oral 34mg/kg (34mg/kg)   American Industrial Hygiene Association Journal. Vol. 21, Pg. 399, 1960.
rat LD50 oral 44mg/kg (44mg/kg) SKIN AND APPENDAGES (SKIN): HAIR: OTHER American Industrial Hygiene Association Journal. Vol. 21, Pg. 399, 1960.
rat LDLo intraperitoneal 103mg/kg (103mg/kg)   American Industrial Hygiene Association Journal. Vol. 21, Pg. 399, 1960.

Consensus Reports

  Thallium(III) oxide (CAS NO.1314-32-5) and its compounds are on the Community Right-To-Know List. Reported in EPA TSCA Inventory.

Safety Profile

Poison by ingestion, intraperitoneal, and intravenous routes. Combustible by chemical reaction. Evolves O2 @ 875°. Mixtures with sulfur or antimony trisulfide explode when ground. Hydrogen sulfide ignites and may explode weakly on contact with the oxide. When heated to decomposition it emits toxic fumes of Tl. See also THALLIUM COMPOUNDS.Safety information of Thallium(III) oxide (CAS NO.1314-32-5):
Hazard Codes: VeryT+,DangerousN
Risk Statements 
26/28: Very Toxic by inhalation and if swallowed
33: Danger of cumulative effects
51/53: Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment
Safety Statements 
13: Keep away from food, drink and animal feeding stuffs
28: After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer)
45: In case of accident or if you feel unwell, seek medical advice immediately (show label where possible)
61: Avoid release to the environment. Refer to special instructions safety data sheet
RIDADR:  UN 1707 6.1/PG 2
WGK Germany: 3
RTECS: XG2975000
HazardClass: 6.1
PackingGroup: II

Standards and Recommendations

OSHA PEL: TWA 0.1 mg(Tl)/m3 (skin)
ACGIH TLV: TWA 0.1 mg(Tl)/m3 (skin)

Specification

 Thallium(III) oxide is a chemical compound of thallium and oxygen. It occurs in nature as the rare mineral avicennite. Its structure is related to that of Mn2O3 which has a bixbyite like structure. Tl2O3 is metallic with high conductivity and is a degenerate n-type semiconductor which may have potential use in solar cells. A method of producing Tl2O3 by MOCVD is known.Any practical use of thallium(III) oxide will always have to take account of thallium's poisonous nature. Conditions/substances to avoid are: moisture and acids.