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inquiryItems Standard Result Appearance White crystalline powder Complies Assay(SeO2) 98%min
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inquiryMolecular Formula: SeO2 C.A.S No.: 7446-08-4 Property: white crystal powder, easy deliquescence, easily soluble in water and soluble in ethanol. Application: electrolytic manganese
Selenium dioxide Basic information Product Name: Selenium dioxide Synonyms: Selenious acid anhydride;SELENIOUS ANHYDRIDE;SELENIUM AA/ICP CALIBRATION/CHECK STANDARD;SELENIUM AA SINGLE ELEMENT STANDARD;SELENIUM, AAS STANDARD SOLUTION;SELENIUM AA S
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inquiryselenium(IV) oxide
Conditions | Yield |
---|---|
With air In neat (no solvent) reaction at 700°C within 30 minutes;; | 99% |
With oxygen In neat (no solvent) reaction with O2 in presence of N2 (3 % O2) at 700°C within 30 minutes;; | 50.6% |
With oxygen In neat (no solvent) reaction with O2 in presence of N2 (1 % O2) at 700°C within 30 minutes;; | 27.8% |
Conditions | Yield |
---|---|
With NH3; Na2SO3; N2H4*H2O In water Kinetics; byproducts: Zn(O,OH), Zn; 60°C; 20 min; pH 11.5; deposited on glass; not isolated; detected by XPS; | A 14% B 77% C 4% |
selenous acid dimethyl ester
ammonia
A
selenium
B
selenium(IV) oxide
Conditions | Yield |
---|---|
In ammonia reaction of OSe(OCH3)2 with an excess of liq. NH3 in a bomb for 12 h;; evaporation of the excess of NH3; addn. of abs. ether; filtration; washing with H2O and 10% KCN soln.;; | A 5.3% B 45.8% C 48.8% |
Conditions | Yield |
---|---|
In ammonia reaction of OSe(OC2H5)2 with an excess of liq. NH3 in a bomb for 12 h;; evaporation of the excess of NH3; addn. of abs. ether; filtration; washing with H2O and 10% KCN soln.;; | A 5.3% B 45.8% C 48.8% |
In benzene byproducts: N2; dropwise addition of OSe(OCH2CH3)2 to dry benzene; introduction of NH3 into this solution;; sucking off; treatment with water and 10% KCN soln.; carefully dried at 105°C;; |
dimethoxy selenium dioxide
A
formaldehyd
B
formic acid
C
selenium(IV) oxide
Conditions | Yield |
---|---|
zerfaellt bei hoeherere Temperatur explosionartig; |
Conditions | Yield |
---|---|
at 145 - 150℃; |
triselenium dicyanide
hydrogen cyanide
water
A
selenium(IV) oxide
methaneseleninic acid
A
formaldehyd
B
selenium(IV) oxide
C
dimethyl diselenide
Conditions | Yield |
---|---|
at 120℃; beim Schmelzen; |
triselenium dicyanide
water
A
selenium(IV) oxide
B
selenocyanic acid
triselenium dicyanide
water
A
selenium(IV) oxide
B
selenocyanic acid
selenous acid dimethyl ester
ammonia
A
methanol
B
selenium(IV) oxide
Conditions | Yield |
---|---|
und Stehenlassen des Reaktionsgemisches bei Raumtemperatur; |
diethyl selenite
ammonia
benzene
A
selenium(IV) oxide
B
ethanol
1,5-diphenyl-3,3-dichloro-3-selena-1,5-pentanedione
water
A
selenium(IV) oxide
B
acetophenone
1,5-diphenyl-3,3-dichloro-3-selena-1,5-pentanedione
A
selenium(IV) oxide
B
acetophenone
Conditions | Yield |
---|---|
With silver(l) oxide In water |
selenium(IV) fluoride
A
selenium(IV) oxide
B
trifluorophosphoric acid
C
nitrosylsulfuric acid fluoride
D
trifluorophosphane
selenium(IV) oxide
Conditions | Yield |
---|---|
In neat (no solvent) thermal decomposition;; |
Conditions | Yield |
---|---|
In neat (no solvent) Kinetics; byproducts: O2; isothermal heating of silver selenite in open Pt crucible in N2 flow (25cm**3/min), temp. interval of 923-1123 K; |
Conditions | Yield |
---|---|
In neat (no solvent) Kinetics; isothermal heating of cadmium selenite in open Pt crucible in N2 flow (25 cm**3/min), temp. interval of 923-1123 K; | |
In neat (no solvent) Kinetics; isothermal decomposition at 823 - 928 K in N2; |
Conditions | Yield |
---|---|
In solid Kinetics; heating the selenite in air at 1023-1173 K; |
Conditions | Yield |
---|---|
In solid Kinetics; heating the selenite in air at 723-873 K; | |
In neat (no solvent) Kinetics; isothermal heating of Ge selenite in open Pt crucible in N2 flow (25 cm**3/min), temp. interval of 723-923 K; |
ozone
diselenium dichloride
A
selenium(IV) oxide
B
selenium tetrachloride
Conditions | Yield |
---|---|
In not given byproducts: O2; |
selenium oxychloride
ozone
diselenium dichloride
A
selenium(IV) oxide
B
oxygen
Conditions | Yield |
---|---|
In neat (no solvent) | |
In neat (no solvent) |
Conditions | Yield |
---|---|
In neat (no solvent) byproducts: Se chloride; reaction by passing of O3-containing O2 through Se2Cl2;; formation of a white pptn.;; | |
In neat (no solvent) byproducts: Se chloride; reaction by passing of O3-containing O2 through Se2Cl2;; formation of a white pptn.;; |
Conditions | Yield |
---|---|
In tetrachloromethane | |
In neat (no solvent) treatment of Se powder with ozone;; | |
In neat (no solvent) |
Conditions | Yield |
---|---|
dissolution of Nd2O3 in SeOCl2; soln. used as liquid laser; |
Conditions | Yield |
---|---|
In neat (no solvent) Kinetics; isothermal heating of indium selenite in open Pt crucible in N2 flow (25cm**3/min), temp. interval of 723-923 K; | |
In solid Kinetics; thermal decompn. at 723-973 K; |
Conditions | Yield |
---|---|
In neat (no solvent) Kinetics; isothermal heating of Al selenite in open Pt crucible in N2 flow (25 cm**3/min), temp. interval of 723-923 K; | |
In solid Kinetics; thermal decompn. at 723-973 K; |
selenium(IV) oxide
Carbonyl fluoride
A
selenyl fluoride
B
carbon dioxide
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 200°C for 50 h; | A 100% B n/a |
Conditions | Yield |
---|---|
In neat (no solvent, solid phase) mixture ground, pressed into pellets, heated in evac. sealed tube at 300°C for 1 d and at 680 °C for 6 d, cooled to 280 °C at 4 °C, cooled to room temp. in 10 h; elem. anal.; | 100% |
selenium(IV) oxide
Tl(1+)*UO2(2+)*HSeO3(1-)*SeO3(2-)=Tl(UO2)(HSeO3)(SeO3)
Conditions | Yield |
---|---|
In water TlCl, UO3, SeO2 and water were heated in PTFE-lined autoclave for 72 h at 180°C and cooled at 9°C/h to 23°C, crystals were washed with water and MeOH and dried; | 99% |
selenium(IV) oxide
Conditions | Yield |
---|---|
In neat (no solvent) "Pr2O3":SeO2 molar ratio was 1:6, LiCl:RbCl olar ratio was 1.37:1, excess of fluxing agent, 500 °C in an evacuated silica ampoule, 2 months; | 99% |
Conditions | Yield |
---|---|
In neat (no solvent, solid phase) heating 3:2:1 mixt. of nickel oxide, molybdenum trioxide and selenum dioxide in vac. at 710°C for 6 d; IR; | 99% |
Conditions | Yield |
---|---|
In neat (no solvent, solid phase) by a react. of a mixt. of SrO, SrCl2 and SeO2 in a molar ratio of 2:1:3 at 660°C for 6 d; identified by XRD; | 99% |
Conditions | Yield |
---|---|
In water teflon-lined hydrothermal bomb; 473 K, 4 d; sonication (1 h in H2O); | 96% |
selenium(IV) oxide
Rb(1+)*UO2(2+)*HSeO3(1-)*SeO3(2-)=Rb(UO2)(HSeO3)(SeO3)
Conditions | Yield |
---|---|
In water RbCl, UO3, SeO2 and water were heated in PTFE-lined autoclave for 72 h at 180°C and cooled at 9°C/h to 23°C, crystals were washed with water and MeOH and dried; | 96% |
Conditions | Yield |
---|---|
In water Ba:Mo:Se = 1:1:1, hydrothermal treatment (autogenous pressure, 160°C, 4 d); | 96% |
Conditions | Yield |
---|---|
In water High Pressure; mixt. of oxides and water heated in autoclave at 160°C for 3 d, cooled to room temp. over a few h; | 95.2% |
Conditions | Yield |
---|---|
With sodium acetate buffer In water SeO2 and Na2WO4*2H2O added to soln. of CuCl2*2H2O (molar ratio 1:9:1.6) in sodium acetate buffer (pH 4.8); heated to 90°C for 1 h; cooled; solid CsCl added; ppt. isolated; air dried; elem. anal.; | 95% |
selenium(IV) oxide
Conditions | Yield |
---|---|
In water High Pressure; BaCO3, NiCl2*6H2O and SeO2 (1:2:3) in H2O heated in an autoclave at 180°C for 3 d; cooled to room temp. over 3 h, filtered, washed (H2O); | 95% |
Conditions | Yield |
---|---|
In neat (no solvent, solid phase) from a stoich. mixt. of SeO2 and Na2MoO4; heating to 370°C for 1 d and then cooling at 6°/h to ambient temp. in an evacuated and sealed tubes; | 90% |
Conditions | Yield |
---|---|
In neat (no solvent, solid phase) from a stoich. mixt. of SeO2 and K2MoO4; heating to 370°C for 1 dand then cooling at 6°/h to ambient temp. in an evacuated and se aled tubes; | 90% |
selenium
selenium(IV) oxide
bromine
diselenium dibromide
Conditions | Yield |
---|---|
With sulfur dioxide In water simultaneous addition of Br2 and introduction of SO2 into a soln. of SO2 in ice water; after decoloration, SeO2 and Se are added; addition of concd. H2SO4; cooling;; washing with concd. H2SO4;; | 90% |
With SO2 In water simultaneous addition of Br2 and introduction of SO2 into a soln. of SO2 in ice water; after decoloration, SeO2 and Se are added; addition of concd. H2SO4; cooling;; washing with concd. H2SO4;; | 90% |
Conditions | Yield |
---|---|
In water High Pressure; Ca(OH)2, V2O5 and SeO4 and water were heated in Teflon-lined autoclave at 230°C for 4 days; react. mixt. was cooled slowly to room temp. at 6°C/h, ppt. was filtered, washed with water and acetone; | 90% |
selenium(IV) oxide
Conditions | Yield |
---|---|
In water High Pressure; UO3, SeO2, CaCO3, Ca(OH)2 and water were loaded in autoclave, sealed, placed in furnace for 30 ds at 180°C, cooled to 23°C at 9°C/h; washed with MeOH, dried; | 89% |
selenium(IV) oxide
K(1+)*UO2(2+)*HSeO3(1-)*SeO3(2-)=K(UO2)(HSeO3)(SeO3)
Conditions | Yield |
---|---|
In water KCl, UO3, SeO2 and water were heated in PTFE-lined autoclave for 72 h at180°C and cooled at 9°C/h to 23°C, crystals were w ashed with water and MeOH and dried; | 88% |
Conditions | Yield |
---|---|
In water molar ratio V2O5:V2O3:SeO2:KOH=2:2:15:10, 230°C, 3 d (autoclave); slow cooling to room temp., collection (filtration); powder X-ray diffraction, optical microscopy; | 87% |
In water molar ratio V2O5:V2O3:SeO2:KOH=3:1:15:10, 230°C, 3 d (autoclave); slow cooling to room temp., collection (filtration); powder X-ray diffraction, optical microscopy; | 69% |
Conditions | Yield |
---|---|
In methanol byproducts: CO2; room temp.; recrystn. (ether/methanol); elem. anal.; | 87% |
Conditions | Yield |
---|---|
mixt. (NH4:W:Se=2:1:2) placing in Teflon-lined hydrothermal reaction vessel, heating to 210°C for 10 d (final pH 3.4); TGA; | 86% |
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