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Tellurium dioxide

CAS Number
7446-07-3
EC Number
231-193-1
Chemical Formula
O2Te
Molecular Weight
159.6 g/mol
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Description

Tellurium dioxide (CAS 7446-07-3 ), also abbreviated as TeO2, is an inorganic oxide of tellurium used primarily in electronics and specialty chemical manufacturing. It functions as a catalyst and optical material, enabling precise control in acousto-optical and electrochemical processes. In acousto-optic devices, TeO2 crystals are used to manufacture deflectors. These crystals are also used for modulators and tunable filters for laser systems and telecommunications equipment. The compound serves as a precursor in the production of tellurite glass. This glass is incorporated into fiber optic amplifiers and infrared-transmitting optical components. In catalysis, it supports selective oxidation reactions in specialty chemical synthesis. This includes the production of fine chemicals and pharmaceutical intermediates. Thin-film deposition processes in semiconductor fabrication also consume TeO2 as a sputtering target material. It is used for phase-change memory applications. Tellurium dioxide is supplied as a white crystalline powder in technical and high-purity grades for electronic and optical applications. Purity levels commonly range from 99% to 99.999% (5N). High-purity sputtering targets are available as pressed and sintered forms to meet semiconductor-grade specifications. Packaging is typically offered in small laboratory quantities through to kilogram-scale lots depending on purity grade. This ensures flexibility for both research and industrial production. Contact us for supply of Tellurium dioxide Request Quote

Other Names (Synonyms)

Tellurium oxide (TeO2) | 397E9RKE83 | RefChem:187769 | Tellurium(IV) oxide | Telluria | Tellurium oxide | TeO2

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point733 °C
Boiling Point1250 °C
Density5.67 g/cm³ (solid)
Appearancewhite crystalline powder
ColorWhite to slightly yellow
FormPowder
Water Solubilityinsoluble
Vapor Pressure0Pa at 25℃

Safety & Handling

Danger
GHS08· Health HazardGHS07· IrritantGHS09· Environment

Hazard Statements

H317May cause an allergic skin reaction
H332Harmful if inhaled
H360May damage fertility or the unborn child
H361Suspected of damaging fertility or the unborn child
H362May cause harm to breast-fed children
H373May causes damage to organs through prolonged or repeated exposure
H411Toxic to aquatic life with long lasting effects

Precautionary Statements

P203Obtain, consult and follow expert instructions for use.
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P263Avoid contact during pregnancy and while nursing.
P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P271Use only outdoors or in a well-ventilated area.
P272Contaminated work clothing should not be allowed out of the workplace.
P273Avoid release to the environment.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P317Get emergency medical help.
P318IF exposed or concerned, get medical advice.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P391Collect spillage.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P352IF ON SKIN: Wash with plenty of water.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P317Get emergency medical help.
P364Take off contaminated clothing and wash it before reuse.

Trade & Regulatory

HS Code28112900
UN Number3284
ADR Class6.1
Packing GroupIII
WGK (Germany)2