CAS No.7446-07-3,Tellurium dioxide Suppliers,MSDS download

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Basic Information

Molecular Structure:
CAS No.:	7446-07-3
Name:	Tellurium dioxide
Article Data:	471

Formula:	TeO₂
Molecular Weight:	159.599
Synonyms:	Telluria;Tellurium(IV) oxide;Tellurium oxide (TeO2);
EINECS:	231-193-1
Density:	5.67g/mLat 25°C(lit.)
Melting Point:	733 °C(lit.)
Boiling Point:	1245 °C
Solubility:	insoluble in water
Appearance:	white crystalline powder
Safety:	24/25
Transport Information:	UN 3284 6.1/PG 3
PSA:	34.14000
LogP:	-0.61840

Synthetic route

: 10025-71-5
tellurium dichloride

: 10544-72-6
dinitrogen tetraoxide

: 7446-07-3
tellurium(IV) oxide

Conditions

Conditions	Yield
In neat (no solvent) byproducts: NOCl; reaction of TeCl2 with liquid N2O4;;	100%

: tellurium trisulfide

: 7446-07-3
tellurium(IV) oxide

Conditions

Conditions	Yield
With air In neat (no solvent) heating in air above 430°C; at 630.degree C complete conversion;;	100%

: tellurium

: 7446-07-3
tellurium(IV) oxide

Conditions

Conditions	Yield
In hydrogenchloride Electrochem. Process; anodic dissolution of Te in 6n HCl in a cell with ceramic diaphragma, neutralisation with aq. NH3;; pure;;	98%
In hydrogenchloride byproducts: H6TeO6; Electrolysis; electrolysis in HCl acidic soln. at 25 °C with a Te-anode;;
With calcium oxide In neat (no solvent) byproducts: CaTeO3, Ca3TeO6; oxidation of Te in air in presence of CaO at 100-800°C;;

: tellurium

: potassium nitrate

: 7446-07-3
tellurium(IV) oxide

Conditions

Conditions	Yield
In melt Te and KNO3 were molten for 2 h at 400-430 °C (molar ratio 1/2-2.5), the melt was dissolved in aq. KOH(10%) forming K2TeO3 which was treated with HNO3;;	97.5%

: tellurium

: 7631-99-4
sodium nitrate

: 7446-07-3
tellurium(IV) oxide

Conditions

Conditions	Yield
In melt Te and NaNO3 were molten for 2 h at 400-430 °C (molar ratio 1/2-2.5), the melt was dissolved in aq. KOH(10%) forming K2TeO3 which was treated with HNO3;;	97.5%

: tellurium

: barium(II) nitrate

: 7446-07-3
tellurium(IV) oxide

Conditions

Conditions	Yield
In melt byproducts: BaTeO3, Ba3TeO6; melting of a mixture of Te and anhydrous Ba(NO3)2 (in 10% excess) at temp. between 400 and 550°C; oxidation of Te starts at 345-400°C, at 650°C 65% TeO2 was formed;;	65%

: 10361-37-2
barium(II) chloride dihydrate

: ammonium chloride

: 7803-68-1
orthotelluric acid

: copper(II) oxide

A: 7446-07-3
tellurium(IV) oxide

B: Cu2Te3O8

C: Ba2Cu4Te4O11Cl4

Conditions

Conditions	Yield
In water molar ratio Ba:Cu:Te=1:2:2, excess 2 M aq. NH4Cl, sealed silica tube, 375°C, 5 d; collection (filtration), washing (water, Me2CO), hand sepn.;	A n/a B n/a C 30%

...Expand

: sodium tellurate

: 7446-07-3
tellurium(IV) oxide

Conditions

Conditions	Yield
With sulfur In neat (no solvent) reduction with S;;

: cerium telluride

: 7446-07-3
tellurium(IV) oxide

Conditions

Conditions	Yield
With air In neat (no solvent) byproducts: CeO2; CeTe was heated in air;;
In neat (no solvent)

: cerium telluride

: 7732-18-5
water

: 7446-07-3
tellurium(IV) oxide

Conditions

Conditions	Yield
In neat (no solvent) byproducts: Ce(OH)3; Te was heated in a stream of H2O vapor with ignition;;
In neat (no solvent)

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Consensus Reports

Reported in EPA TSCA Inventory.

Standards and Recommendations

OSHA PEL: TWA 0.1 mg(Te)/m³
ACGIH TLV: TWA 0.1 mg(Te)/m³

Specification

The Tellurium dioxide is an organic compound with the formula TeO₂. The IUPAC name of this chemical is tellurium dioxide. With the CAS registry number 7446-07-3, it is also named as tellane, oxo-, oxide. The product's categories are Inorganics; Metal and Ceramic Science; Oxides; Tellurium. Besides, it is a white crystalline powder, which can be used as an acousto-optic material and a conditional glass former. Tellurite glasses have high refractive indices and also have been shown to exhibit Raman gain up to 30 times that of silica, useful in optical fibre amplification. When you are using it, avoid contact with skin and eyes.

Physical properties about Tellurium dioxide are: (1)#H bond acceptors: 2; (2)Polar Surface Area: 34.14 Å².

Preparation: this chemical is produced by reacting tellurium with O₂: Te + O₂ → TeO₂
It can also be prepared by dehydrating tellurous acid or thermally decomposing basic tellurium nitrate above 400°C.

You can still convert the following datas into molecular structure:
(1)SMILES: O=[Te]=O
(2)InChI: InChI=1/O2Te/c1-3-2
(3)InChIKey: LAJZODKXOMJMPK-UHFFFAOYAO
(4)Std. InChI: InChI=1S/O2Te/c1-3-2
(5)Std. InChIKey: LAJZODKXOMJMPK-UHFFFAOYSA-N

The toxicity data is as follows:

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
rabbit	LDLo	unreported	324mg/kg (324mg/kg)		Scottish Medical and Surgical Journal. Vol. 26, Pg. 131, 1826.
rat	LD50	oral	> 5gm/kg (5000mg/kg)	GASTROINTESTINAL: "HYPERMOTILITY, DIARRHEA"	TNO-report. Vol. TNO-96-514,
rat	LDLo	intratracheal	80mg/kg (80mg/kg)	LUNGS, THORAX, OR RESPIRATION: DYSPNEA KIDNEY, URETER, AND BLADDER: OTHER CHANGES GASTROINTESTINAL: OTHER CHANGES	American Industrial Hygiene Association Journal. Vol. 39, Pg. 100, 1978.