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
- color
- White to slightly yellow
- Specific Gravity
- 5.8
- Water Solubility
- insoluble
- λmax
- 360nm(neat)(lit.)
- Merck
- 14,9123
- crystal system
- square
- Space group
- P41212
- Lattice constant
a/nm b/nm c/nm α/o β/o γ/o V/nm3 0.48122 0.48122 0.76157 90 90 90 0.1764 - 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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View Lastest Price from Tellurium dioxide manufacturers
Hebei Weibang Biotechnology Co., Ltd
- Product
- Tellurium dioxide 7446-07-3
- Price
- US $10.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 10 mt
- Release date
- 2024-11-13
Hebei Weibang Biotechnology Co., Ltd
- Product
- Tellurium dioxide 7446-07-3
- Price
- US $0.00-0.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 500000kg
- Release date
- 2024-11-01
Hebei Chuanghai Biotechnology Co,.LTD
- Product
- Tellurium dioxide 7446-07-3
- Price
- US $150.00-90.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 10000kg
- Release date
- 2024-08-20
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