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71950

Sigma-Aldrich

Sodium selenite

anhydrous, ≥90.0% (RT)

Fórmula lineal:
Na2SeO3
Número de CAS:
Peso molecular:
172.94
Número de EC:
Número MDL:
ID de la sustancia en PubChem:
NACRES:
NA.22

Nivel de calidad

300

ensayo

≥90.0% (RT)

pérdida

≤0.5% loss on drying, 200 °C

mp

>350 °C (lit.)

SMILES string

[Na+].[Na+].[O-][Se]([O-])=O

InChI

1S/2Na.H2O3Se/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2

InChI key

BVTBRVFYZUCAKH-UHFFFAOYSA-L

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Aplicación

Sodium selenite is a common source of selenium in the synthesis of zinc selenide (ZnSe). It is used as a key precursor in the synthesis of bismuth selenide nanocomposites, nickel cobalt selenides, selenium nanobelts and t-selenium nanotubes.
Sodium selenite can be used:
  • In dehydrogenation of benzoins to benzils and, flavanones to flavones under thermal and microwave conditions.
  • As a catalyst along with cysteine or glutathione in the reductive debromination of vic-dibromides to alkenes.
  • To prepare bis(methylmercuric) selenide (BMS) by reacting with methylmercuric chloride and reduced glutathione or cysteine.

Envase

100, 500 g in poly bottle

pictogramas

Skull and crossbonesEnvironment

Palabra de señalización

Danger

Clasificaciones de peligro

Acute Tox. 2 Inhalation - Acute Tox. 2 Oral - Aquatic Chronic 2 - Eye Irrit. 2 - Skin Irrit. 2 - Skin Sens. 1

Riesgos supl.

Código de clase de almacenamiento

6.1B - Non-combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 2

Punto de inflamabilidad F

Not applicable

Punto de inflamabilidad C

Not applicable

Equipo de protección personal

Eyeshields, Faceshields, Gloves, type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges

Certificado de Análisis

Certificado de origen

Sodium selenite-dimethylsulfoxide: a highly efficient reagent for dehydrogenation
Lamba M and Makrandi JK
J. Chem. Res. (M), 2008(4), 225-226 (2008)
Nucleation- dissolution- recrystallization: a new growth mechanism for t-selenium Nanotubes.
Xi G, et al.
Crystal Growth & Design, 6(2), 577-582 (2006)
Hydrothermal synthesis and high photocatalytic activity of 3D wurtzite ZnSe hierarchical nanostructures.
Cao F, et al.
The Journal of Physical Chemistry C, 112(44), 17095-17101 (2008)
Cellulose-directed growth of selenium nanobelts in solution.
Lu Q, et al.
Chemistry of Materials, 18(1) (2006)
New method for bis (methylmercuric) selenide synthesis from methylmercuric chloride, sodium selenite and reduced glutathione
Naganuma A and Imura N
Chemosphere, 10(4), 441-443 (1981)

Artículos

Dietary Antioxidants

Antioxidants protect biological systems from oxidative damage produced by oxygen-containing free radicals and from redoxactive transition metal ions such as iron, copper, and cadmium.

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