ChemicalBook > CAS DataBase List > Tellurium dioxide

Tellurium dioxide

Product Name
Tellurium dioxide
CAS No.
7446-07-3
Chemical Name
Tellurium dioxide
Synonyms
TeO2;TelluriumDiox;TELLERIUM OXIDE;Tellurium dioxide;TELLURIUM(+4)OXIDE;TELLURIUM(IV) OXIDE;Tellurous anhydride;telluriumoxide(teo2);Tellurium(IV)dioxide;Tellurium oxide, 99%+
CBNumber
CB1670143
Molecular Formula
O2Te
Formula Weight
159.6
MOL File
7446-07-3.mol
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Tellurium dioxide Property

Melting point:
733 °C (lit.)
Boiling point:
1245 °C
Density 
5.67 g/mL at 25 °C (lit.)
vapor pressure 
0Pa at 25℃
storage temp. 
no restrictions.
solubility 
insoluble in H2O; soluble in alkaline solutions, acid solutions
form 
Powder
Specific Gravity
5.8
color 
White to slightly yellow
Water Solubility 
insoluble
λmax
360nm(neat)(lit.)
Merck 
14,9123
Exposure limits
ACGIH: TWA 0.1 mg/m3
NIOSH: IDLH 25 mg/m3; TWA 0.1 mg/m3
Stability:
Stable. Incompatible with strong acids, strong oxidizing agents.
CAS DataBase Reference
7446-07-3(CAS DataBase Reference)
NIST Chemistry Reference
tellurium(IV) dioxide(7446-07-3)
EPA Substance Registry System
Tellurium oxide (TeO2) (7446-07-3)
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Safety

Safety Statements 
24/25
RIDADR 
UN 3284 6.1/PG 3
WGK Germany 
2
RTECS 
WY2675000
TSCA 
Yes
HazardClass 
6.1(a)
PackingGroup 
II
HS Code 
28112900
Toxicity
LD50 orally in Rabbit: > 2000 mg/kg
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H317May cause an allergic skin reaction

H332Harmful if inhaled

H411Toxic to aquatic life with long lasting effects

Precautionary statements

P202Do not handle until all safety precautions have been read and understood.

P273Avoid release to the environment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P308+P313IF exposed or concerned: Get medical advice/attention.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
204552
Product name
Tellurium dioxide
Purity
99.995% trace metals basis
Packaging
10g
Price
$108
Updated
2024/03/01
Sigma-Aldrich
Product number
204552
Product name
Tellurium dioxide
Purity
99.995% trace metals basis
Packaging
50g
Price
$358
Updated
2024/03/01
Sigma-Aldrich
Product number
1.12356
Product name
Tellurium dioxide
Purity
99.5+
Packaging
10g
Price
$105
Updated
2024/03/01
Sigma-Aldrich
Product number
1.12356
Product name
Tellurium dioxide
Purity
99.5+
Packaging
25g
Price
$127
Updated
2024/03/01
Sigma-Aldrich
Product number
435902
Product name
Tellurium dioxide
Purity
99.9995%
Packaging
5G
Price
$88.2
Updated
2023/01/07
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Tellurium dioxide Chemical Properties,Usage,Production

Chemical Properties

Heavy, white, crystalline powder; odorless. Soluble in concentrated acids, alkalies; slightly soluble in dilute acids, water.

Physical properties

White crystals; dimorphic; exists in tetragonal and orthorhombic forms; density 5.75 g/cm3 (tetragonal), 6.04 g/cm3 (orthorhombic); melts at 733°C forming a deep yellow liquid; vaporizes at 1,245°C; insoluble in water; soluble in acids and alkalies.

Uses

Tellurium dioxide is used to prepare tellurium metal, telluric acid, and many tellurium salts. It may also be used in the preparation of Ag2Te nanoparticles.

Uses

TeO2 can be potentially used in medical imaging and industrial monitoring processes.

Uses

Tellurium dioxide is also used in devices which can convert light into sound (acousto-optic material). Glasses made of tellurium oxide have high refractive indices and transmit into mid-IR region. It is used to make glasses with special properties. It is useful in optical waveguides and optical fiber amplification.

Production Methods

Tellurium dioxide in its orthorhombic form occurs in nature as mineral tellurite. It is mined from natural deposits. Also, tellurium dioxide is produced as an intermediate during recovery of tellurium metal from anode slimes of electrolytic copper refining (See Tellurium, Production). The dioxide also is prepared by treating tellurium metal with hot nitric acid to form 2TeO2?HNO3. The product then is heated to drive off nitric acid.

General Description

Tellurium dioxide (TeO2) is a ceramic material that can be used as a semiconducting oxide. It has a wide band gap and high mobility as determined by density functional theory (DFT) calculations. In bulk quantity, it exists in two polymorphs which include tetragonal α-TeO2 and orthorhombic β-TeO2.

Flammability and Explosibility

Non flammable

Safety Profile

Poison by intratracheal route. An experimental teratogen. Experimental reproductive effects. When heated to decomposition it emits toxic fumes of Te. See also TELLURIUM COMPOUNDS.

Purification Methods

Dissolve it in 5M NaOH, filter it and precipitate it by adding 10M HNO3 to the filtrate until the solution is acid to phenolphthalein. After decanting the supernatant, the precipitate is washed five times with distilled water, then dried for 24hours at 110o [Horner & Leonhard J Am Chem Soc 74 3694 1952].

Tellurium dioxide Preparation Products And Raw materials

Raw materials

Preparation Products

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Tellurium dioxide Suppliers

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View Lastest Price from Tellurium dioxide manufacturers

Ouhuang Engineering Materials (Hubei) Co., Ltd
Product
Tellurium dioxide 7446-07-3
Price
US $10.00/kg
Min. Order
1kg
Purity
99.6%
Supply Ability
100000
Release date
2024-04-25
Ouhuang Engineering Materials (Hubei) Co., Ltd
Product
Tellurium dioxide 7446-07-3
Price
US $1.00/KG
Min. Order
1KG
Purity
99.91%
Supply Ability
200000
Release date
2024-04-24
Hebei Mojin Biotechnology Co., Ltd
Product
Tellurium dioxide 7446-07-3
Price
US $0.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
50000KG/month
Release date
2023-09-20

7446-07-3, Tellurium dioxideRelated Search:

Quartz Zirconium dioxide Sulfurous Acid Carbon dioxide Chlorine dioxide Tellurium Rutile Tellurium tetrachloride SODIUM TELLURATE TELLURIC ACID Tellurium oxide POTASSIUM TELLURATE AMMONIUM TELLURIUM OXIDE ANTIMONY (IV) OXIDE sulfur dioxide RUBIDIUM TELLURATE Tellurium dioxide STRONTIUM TELLURATE

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