Conditions | Yield |
---|---|
In neat (no solvent) byproducts: NOCl; reaction of TeCl2 with liquid N2O4;; | 100% |
tellurium(IV) oxide
Conditions | Yield |
---|---|
With air In neat (no solvent) heating in air above 430°C; at 630.degree C complete conversion;; | 100% |
tellurium(IV) oxide
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;; |
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% |
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% |
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% |
barium(II) chloride dihydrate
orthotelluric acid
A
tellurium(IV) oxide
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% |
tellurium(IV) oxide
Conditions | Yield |
---|---|
With sulfur In neat (no solvent) reduction with S;; |
tellurium(IV) oxide
Conditions | Yield |
---|---|
With air In neat (no solvent) byproducts: CeO2; CeTe was heated in air;; | |
In neat (no solvent) |
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) |
tellurium(IV) oxide
Conditions | Yield |
---|---|
In water pptn. from Na2TeO3-soln. with HNO3 at 100 °C and pH 3.5-4.0 at the end of the pptn.;; purity: 99.85-99.95%;; | |
In water air introducing; | |
In water air introducing; |
Conditions | Yield |
---|---|
With potassium hydroxide; hydrazine hydrate In water Kinetics; components soln. mixing (pH 9.3 (KOH), conct. temp. in range 18-80°C), pptn.; ppt. filtration off, washing (6% HNO3 to remove TeO2); chem. anal.; |
Conditions | Yield |
---|---|
In not given hydrolysis of K2(Te(NH)3) (moistened with benzene) with acetic acid under exclusion of air forms TeO2*H2O; loss of H2O on heating;; |
Conditions | Yield |
---|---|
In nitric acid disssolving finely powdered, distillated Te with small amount of water in aq. HNO3; evapn. on water bath; heating residue;; | >99 |
In water byproducts: H2; from metallic Te and dry air; heating to 160°C;; formation of TeO2 at surface of Te;; | |
In water byproducts: H2; from metallic Te and dry air; heating to 160°C;; formation of TeO2 at surface of Te;; | |
In nitric acid aq. HNO3; disssolving finely powdered, distillated Te with small amount of water in aq. HNO3; evapn. on water bath; heating residue;; | >99 |
Conditions | Yield |
---|---|
In water Te was heated with H2O and O2 under pressure (60 atm) at 150°C;; the formed solid phase is a mixture of TeO2 and Te;; |
Conditions | Yield |
---|---|
In water byproducts: HBr, CaF2; hydrolysis;; |
Conditions | Yield |
---|---|
In water byproducts: HCl; hydrolysis with H2O;; | |
In water precipitation of TeO2 on cooling a soln. of TeCl4 in boiling H2O;; impurities of a basic salt;; | |
In water precipitation of TeO2 on cooling a soln. of TeCl4 in boiling H2O;; impurities of a basic salt;; |
Conditions | Yield |
---|---|
In further solvent(s) byproducts: C6F5H; in EtCN; |
Conditions | Yield |
---|---|
In not given |
Conditions | Yield |
---|---|
byproducts: HCl, (CH3)2SO; hydrolysis;; |
tellurium(VI) oxide
tellurium(IV) oxide
Conditions | Yield |
---|---|
In neat (no solvent) heating at 430°C;; | |
In neat (no solvent) decomposition of β-TeO3 started at 350 °C, the reaction is at 600 °C complete (in presence of Na2CO3 at 700 °C);; | >99 |
In neat (no solvent) decomposition of β-TeO3 started at 350 °C, the reaction is at 600 °C complete (in presence of Na2CO3 at 700 °C);; | >99 |
In neat (no solvent) byproducts: O2; decomposition of β-TeO3 started at 430°C, the reaction is at 580°C complete;; | >99 |
In neat (no solvent) isothermal heating at (520+/-10)°C for 120 h in air; X-ray diffraction; |
telluric acid
tellurium(IV) oxide
Conditions | Yield |
---|---|
With osmium In neat (no solvent) byproducts: OsO4; reduction at red heat;; |
Conditions | Yield |
---|---|
In neat (no solvent) oxidation of Te with H2TeO4;; |
tellurium(IV) oxide
Conditions | Yield |
---|---|
In neat (no solvent) decomposition at 840°C;; |
Conditions | Yield |
---|---|
In neat (no solvent) 800-900 K; |
Conditions | Yield |
---|---|
In neat (no solvent) byproducts: CsCl; decomposition on heating at 260, 300 or 350°C;; |
Conditions | Yield |
---|---|
In ammonia byproducts: HNO3, Ag; in aq. NH3 soln.; with excess of Ag(1+) salts;; separation of Ag2TeO3 by washing with aq. NH3;; |
Conditions | Yield |
---|---|
In ammonia byproducts: HNO3; in aq. NH3 soln.;; |
Conditions | Yield |
---|---|
In neat (no solvent) Kinetics; heating at 350-500 ° C; IR; |
Conditions | Yield |
---|---|
In neat (no solvent) byproducts: HgI2; |
tellurium(IV) oxide
Carbonyl fluoride
A
carbon dioxide
B
tellurium(IV) fluoride
Conditions | Yield |
---|---|
In neat (no solvent) slight excess over the stoich. amt. of COF2 required; reaction mixt. heated in a stainless steel or monel cylinder at 160°C for 56 h; | A n/a B 100% |
Conditions | Yield |
---|---|
With NH4Cl In water High Pressure; heating (sealed silica tube, 375°C, 3-5 d); | 99% |
In neat (no solvent) byproducts: NiTe2O5; NiO and TeO2 were heated in a stream of N2 at 550-800 °C;; polluted with NiTe2O5:; | |
In neat (no solvent) NiO and TeO2 were heated in a stream of N2 at 550-800 °C, molten at 900°C for 20 min in goldplate covers;; pure;; |
Conditions | Yield |
---|---|
In neat (no solvent, solid phase) at 720°C for 6 d; | 99% |
With Er2O3 In neat (no solvent, solid phase) ground, pressed, sealed, heated at 720°C for 6 d; cooled to 300°C at 4°C/h; |
tellurium(IV) oxide
cadmium(II) chloride
Conditions | Yield |
---|---|
In neat (no solvent, solid phase) at 670°C for 6 d; | 99% |
Conditions | Yield |
---|---|
In neat (no solvent) the mixt. Sm2O3/MnCl2/TeO2 1:1:5 was ground and pressed into a pellet, sealed into an evacuated quartz tube, heated at 700°C for 6 days, cooled to 500°C at 4.17°C/h before switching off the furnace; XRD powder diffraction; | 99% |
Conditions | Yield |
---|---|
With NH4Cl In water byproducts: ZnTeO3; High Pressure; heating (sealed silica tube, 375°C, 3-5 d); | 99% |
In neat (no solvent) mixed, homogenized, sealed under vac., heated at 50 °C lower thenmelting temp. of tellurate(IV) for 5 h, ground, resealed under vac., he at treated, procedure repeated three times; | |
With PVA In neat (no solvent, solid phase) mixt. ZnO and TeO2 was ball-milled in MeOH for 24 h, dried at 80°C overnight, calcined at 560°C for 19 h, remilled, PVA was added,pressed at 140 MPa, heated at 400°C for 6 h and sintered at 610. degree.C for 2 h; X-ray diffraction; |
Conditions | Yield |
---|---|
In neat (no solvent, solid phase) by a react. of SrO, SrCl2 and TeO2 in a molar ratio of 2:2:3 at 720°C for 6 d; identified by XRD and EDS anal.; | 99% |
In neat (no solvent, solid phase) by a react. of SrO (0.8 mmol), SrCl2 (0.4 mmol) and TeO2 (1.2 mmol); themixt. was ground and pressed into a pellet; heating in an evacuated qua rtz tube at 660°C for 6 d; cooling to 300°C at 4°C/h before switching off the furnace; identified by XRD and EDS anal.; |
tellurium(IV) oxide
neodymium oxide chloride
Conditions | Yield |
---|---|
In neat (no solvent) the mixt. NdOCl/Nd2O3/CuCl/TeO2 2:1:1:5 was ground and pressed into a pellet, sealed into an evacuated quartz tube, heated at 650°C for 6days, cooled to 500°C at 4.17°C/h before switching off th e furnace; XRD powder diffraction; | 99% |
Conditions | Yield |
---|---|
In neat (no solvent, solid phase) mixt. of MoO3, NiO and TeO2 ground; pressed into pellet; sealed in evacuated quartz tube; heated at 720°C for 6 d; cooled to 270°C(4.5°C/h); crystals isolated; elem. anal.; | 99% |
Conditions | Yield |
---|---|
In neat (no solvent, solid phase) heating 1:3:4 mixt. of K2CO3, Nb2O5 and TeO2 at slightly lower than 800°C for 5 ds; powder XRD; | 99% |
Conditions | Yield |
---|---|
In neat (no solvent, solid phase) heating 1:3:4 mixt. of K2CO3, Ta2O5 and TeO2 at slightly lower than 800°C for 5 ds; powder XRD; | 99% |
Conditions | Yield |
---|---|
In neat (no solvent, solid phase) heating 1:3:4 mixt. of Rb2CO3, Nb2O5 and TeO2 at slightly lower than 820°C for 5 ds; powder XRD; | 99% |
In neat (no solvent, solid phase) grinding 1:3:13 mixt. of Rb2CO3, Nb2O5 and TeO2, pressing into pellets, heating at 820°C for 5 ds; cooling to 300°C at rate of 4°C/h, XRD; |
Conditions | Yield |
---|---|
In neat (no solvent, solid phase) heating 3:9:8 mixt. of Rb2CO3, Ta2O5 and TeO2 at slightly lower than 810°C for 5 ds; powder XRD; | 99% |
In neat (no solvent, solid phase) grinding 1:2.66:10 mixt. of Cs2CO3, Nb2O5 and TeO2, pressing into pellets, heating at 810°C for 5 ds; cooling to 300°C at rate of 4°C/h, XRD; |
Conditions | Yield |
---|---|
In neat (no solvent, solid phase) heating 1:3:4 mixt. of Rb2CO3, Ta2O5 and TeO2 at slightly lower than 840°C for 5 ds; powder XRD; | 99% |
In neat (no solvent, solid phase) grinding 1:3:13 mixt. of Rb2CO3, Ta2O5 and TeO2, pressing into pellets, heating at 840°C for 5 ds; cooling to 300°C at rate of 4°C/h, XRD; |
tellurium(IV) oxide
Conditions | Yield |
---|---|
With HCl In hydrogenchloride saturated with H2Te at a pH of 5.0-6.3, 200-250°C, 50-100 MPa; | 98% |
With ethylene glycol In ethylene glycol other Radiation; mixture of ethylene glycol and TeO2 put into microwave oven; heated to 185°C; held at this temp. for 30 min; centrifuged; washed with absolute ethanol several times; dried at 80°C in vacuum; | 90% |
With silver In neat (no solvent) reduction of TeO2 with Ag;; |
Conditions | Yield |
---|---|
In neat (no solvent) heating of equimolar amounts of TeO2 and Na2CO3 at 540 °C in presence of air;; | A 98% B n/a |
In neat (no solvent) heating of equimolar amounts of TeO2 and Na2CO3 at 540 °C in presence of air;; | A 98% B n/a |
In neat (no solvent) heating of equimolar amounts of TeO2 and Na2CO3 at 480-620 °C in presence of air;; |
Conditions | Yield |
---|---|
In water molar ratio Mo:Te=3:1, acid digestion bomb, 225°C, 4 d; then cooling to room temp. over 36 h; | 98% |
In neat (no solvent, solid phase) stoich. amts., heating in air (450°C, 6 h; then 625°C, 2 d; intermittent grinding); |
Conditions | Yield |
---|---|
In neat (no solvent) heating between 975 and 1078°C;; dependence of temp., time and conc. of educts; acceleration by addn. of Na2CO3;; | 98% |
In neat (no solvent) |
Conditions | Yield |
---|---|
With HNO3 In water to the mixt. of Ba, Te comp. and water placed in steel bomb concd. HNO3 was added dropwise to pH ca. 10, mixt. was heated to 180°C for 5 d; solid was recovered by vac. filtration, washed with water and acetone; XRD; | 98% |
Conditions | Yield |
---|---|
In water molar ratio W:Te=3:1, acid digestion bomb, 225°C, 4 d; then cooling to room temp. over 36 h; | 96% |
In neat (no solvent, solid phase) stoich. amts., heating in air (450°C, 6 h; then 580°C, 2 d; intermittent grinding); |
Conditions | Yield |
---|---|
In neat (no solvent) byproducts: SO2; TeO2 was heated with CdS at 600-800°C;; | 95.7% |
In neat (no solvent) byproducts: SO2; TeO2 was heated with CdS at 600-800°C;; | 95.7% |
tellurium(IV) oxide
1,1,3,3-tetramethyl-2-thiourea
hydrogen iodide
Te2(tetramethylthiourea)2I4
Conditions | Yield |
---|---|
In hydrogenchloride; methanol; N,N-dimethyl-formamide to TeO2 dissolved in hot HCl were added with swirling, a hot soln. of tmtu in DMF, then a hot mixt. of HI and MeOH was added, the soln. was kept hot for ca. 30 min, allowed to cool to room temp.; the crystals were filtered, washed with MeOH, then with diethyl ether, recrystd. in DMF/HI, filtered, a hot MeOH was added; elem. anal.; | 95% |
Conditions | Yield |
---|---|
In neat (no solvent) heated at 110-120°C for 5 h;; | 91% |
In neat (no solvent) heated at 110-120°C for 5 h;; | 91% |
tellurium(IV) oxide
Conditions | Yield |
---|---|
In water molar ratio NH4:Mo:Te=5.14:6:1, closed vessel, 225°C. 14 d; | A 91% B n/a |
In water molar ratio NH4:Mo:Te=5.14:6:1, closed vessel, 225°C. 7 d, cooling to room temp. over 2 d; hand sepn. of products; | A 87.5% B n/a |
In water molar ratio NH4:Mo:Te=2.57:3:1, closed vessel, 225°C. 7 d; further unidentified product; | A 41% B n/a |
In water molar ratio NH4:Mo:Te=1.71:2:1, closed vessel, 225°C. 7 d; further unidentified product; |
Conditions | Yield |
---|---|
In hydrogen fluoride addn. KF to suspn. TeO2F2 (prepared from TeO2 in 40% aq. HF) with TeO2:KF ratio = 1:1, pptn.; ppt. sepd. from mother liquor, washed (alcohol), dried (air), elem. anal.; | 90% |
Reported in EPA TSCA Inventory.
OSHA PEL: TWA 0.1 mg(Te)/m3
ACGIH TLV: TWA 0.1 mg(Te)/m3
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. |
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