TELLURIUM DIOXIDE

Synonyms. Tellurium dioxide; Tellurium oxide; Tellurium(IV) oxide; Oxotellane oxide; Tellurite;

TELLURIUM DIOXIDE

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PRODUCT IDENTIFICATION

CAS RN

7446-07-3

EINECS RN

231-193-1

FORMULA

 TeO2

MOLE WEIGHT

159.60

H.S CODE

 2811.29.5000

SMILES

 [Te](=O)=O

CLASSIFICATION

Tellurium compound, Optical material

EXTRA NOTES

 

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE

white to slightly yellowish powder

MELTING POINT

733 C

BOILING POINT

1245 C

DENSITY

5.67 g/ml

SOLUBILITY IN WATER

Insoluble

SOLVENT SOLUBILITY

Soluble in acid and alkali

VAPOR DENSITY

 

log P(octanol-water)

  

VAPOR PRESSURE

  

AUTOIGNITION TEMP

  
pK

 

REFRACTIVE INDEX

2.24 (n20/D)

FLASH POINT

 

 

STABILITY AND REACTIVITY
STABILITY Stable under normal conditions.

INCOMPATIBLE MATERIALS

Strong acids, Strong oxidizing agents

POLYMERIZATION

Has not been reported

NFPA RATINGS

Health: 1, Flammability: 0, Reactivity: 0

 

EXTERNAL LINKS & GENERAL DESCRIPTION

USA.gov - Tellurium dioxide

Wikipedia Linking - Tellurium dioxide

Google Scholar Search - Tellurium dioxide

U.S. National Library of Medicine - Tellurium dioxide

PubChem Compound Summary - Tellurium dioxide

NCBI (http://www.ncbi.nlm.nih.gov/) -  Tellurium dioxide

Material Safety Data Sheet - Tellurium dioxide

EPA - Substance Registry Services - Tellurium dioxide

http://www.gr.nl/
Elemental tellurium is used as an additive to copper, iron, and steel, in vulcanising rubber, as a colouring agent in glass and ceramics, and in some other applications (ACG99, Bud96). Certain telluride alloys are employed in the semiconductor industry (ACG99). Tellurium tetrachloride is used as a catalyst in several condensation reactions. Tellurium dioxide is used in acousto-optical filters in astronomy and in lasers, as a catalyst in oxidation reactions, in electroconductivity devices, as an additive in glass, in optical and photoacoustic devices. Tellurium trioxide is used as a catalyst in oxidation reactions (12th Collective Index of Chemical Abstracts: 12CI).

 

SALES SPECIFICATION

APPEARANCE

white to slightly yellowish powder

ASSAY

99.0% min

TRACE IMPURITY

Pb 50, Fe 50, Cu 50 (ppm max)

 

TRANSPORT & REGULATORY INFORMATION

UN NO.

 

HAZARD CLASS

 

PACKING GROUP  

 

SAFETY INFORMATION

HAZARD OVERVIEW

GHS (Globally Harmonised System) Classification: Not a dangerous substance. Potential Health Effects: Eyes - May cause eye irritation. Skin - May be harmful if absorbed through skin May cause skin irritation. Inhalation - May be harmful if inhaled. May cause respiratory tract irritation. Ingestion - May be harmful if swallowed.

HAZARD CODES

 

RISK PHRASES

 

SAFETY PHRASES

 

 

PACKING

Preserved in light-resistant and well-closed bottles