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Silicates, borates and other salts

Tellurium dioxide

Also known as Tellurium oxide (TeO2), Tellurium oxide, Tellurium(IV) oxide

CAS 7446-07-3Formula O2TeMolar mass 159.60 g/molEC 231-193-1
GHS signal word: Danger. Pictograms: Serious health hazard 11 suppliers listed
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Tellurium dioxide chemical structure, O2Te, CAS 7446-07-3
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Solid
Melting point
733 °C
Boiling point
1,245 °C
Density
5.9 @25 °C
HS code
285390
Category
Silicates, borates and other salts
Illustrative photo, closed blue fibre drums on a pallet in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Tellurium dioxide?

Plain description, key identifiers and synonyms

Tellurium dioxide is a chemical substance with the molecular formula O2Te and a molar mass of 159.60 g/mol. Its CAS registry number is 7446-07-3.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
tellurium dioxide
CAS number
7446-07-3 CAS number cross-checkedOther or deprecated CAS: 14832-87-2, 59863-17-1
EC number
231-193-1
Molecular formula
O2Te
UNII
397E9RKE83
MDL number
MFCD00011263
InChIKey
LAJZODKXOMJMPK-UHFFFAOYSA-N
InChI
InChI=1S/O2Te/c1-3-2
SMILES (canonical and isomeric)
O=[Te]=O

Synonyms

  • Tellurium oxide (TeO2)
  • Tellurium oxide
  • Tellurium(IV) oxide
  • Tellurite (TeO2)
  • TeO2
  • Tellurium oxide(119TeO2) (9CI)
  • oxotellane oxide
  • Tellurite (mineral)
  • O2Te
  • Dioxo-lambda~4~-tellane
  • Tellurium dioxide, >=99%
  • Tellurium dioxide, >=97.0%
  • Tellurium dioxide, optical grade
  • Tellurium dioxide, 99.9995%
  • Tellurium Oxide Nanoparticle Dispersion
  • Tellurium dioxide, 99.995% trace metals basis
  • Tellurium(IV) oxide, 99.999% (metals basis)

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Physical form
Solidexp.
Melting point
733 °Cexp.
Boiling point
1,245 °Cexp.
Density
5.9 @25 °Cexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
159.60 g/molcalc.
Exact mass
161.8961 Dacalc.
LogP (octanol/water)
-0.62calc.
Topological polar surface area
34.14 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
3calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H360DfMay damage the unborn child. Suspected of damaging fertility.
  • H362May cause harm to breast-fed children.
Precautionary statements (9)
  • P203Obtain, read and follow all safety instructions before use.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P263Avoid contact during pregnancy and while nursing.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P318If exposed or concerned, get medical advice.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Tellurium dioxide suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 11 suppliers
11 of 11 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

11 suppliers in 4 countries

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Tellurium dioxide price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 052-002-00-6

Health and food

  • EU Cosmetics Regulation Annex II, prohibited in cosmetics
    Name: Tellurium dioxide, Ref no: 1698, Annex ref: II/1698

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Tellurium dioxide is traded under.

HS 2853.90Indicative HS code

Phosphides, whether or not chemically defined, excluding ferrophosphorus, other, other

World exports in 2024
$2.45B
−33.6% vs 2023, imports $816M
2019 to 2024
Top exporters
  1. China68.4%
  2. Israel8.1%
  3. United States4.9%
Top importers
  1. United States19.3%
  2. Japan17.9%
  3. China13.4%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Tellurium dioxide is indicative (it is known at chapter level only). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Tellurium dioxide, based on the data on this page

What is Tellurium dioxide?

Tellurium dioxide is a chemical substance with the molecular formula O2Te and a molar mass of 159.60 g/mol. Its CAS registry number is 7446-07-3.

What is the CAS number of Tellurium dioxide?

The CAS registry number of Tellurium dioxide is 7446-07-3. Other or deprecated CAS numbers: 14832-87-2, 59863-17-1.

What is the molecular formula and weight of Tellurium dioxide?

The molecular formula of Tellurium dioxide is O2Te and its molar mass is 159.60 g/mol.

Is Tellurium dioxide hazardous?

Tellurium dioxide carries the GHS signal word "Danger". Main hazards: may damage the unborn child. suspected of damaging fertility, may cause harm to breast-fed children. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Tellurium dioxide?

Tellurium dioxide is usually classified under HS code 285390 (Phosphides, whether or not chemically defined, excluding ferrophosphorus, other…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Tellurium dioxide?

CompoundList lists 11 suppliers of Tellurium dioxide in United States, China, India and Germany. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Tellurium dioxide in India?

2 suppliers in India list Tellurium dioxide on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Tellurium dioxide?

Suppliers quote Tellurium dioxide on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Tellurium dioxide

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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