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71950

Sigma-Aldrich

Sodium selenite

anhydrous, ≥90.0% (RT)

Synonym(s):

Selenious acid disodium salt

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About This Item

Linear Formula:
Na2SeO3
CAS Number:
Molecular Weight:
172.94
EC Number:
MDL number:
UNSPSC Code:
12352302
PubChem Substance ID:
NACRES:
NA.22

Quality Level

Assay

≥90.0% (RT)

form

powder

loss

≤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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Application

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.

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.

Pictograms

Skull and crossbonesEnvironment

Signal Word

Danger

Hazard Classifications

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

Supplementary Hazards

Storage Class Code

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

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Sodium selenite-dimethylsulfoxide: a highly efficient reagent for dehydrogenation
Lamba M and Makrandi JK
J. Chem. Res. (M), 2008(4), 225-226 (2008)
Cellulose-directed growth of selenium nanobelts in solution.
Lu Q, et al.
Chemistry of Materials, 18(1) (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)
Nucleation- dissolution- recrystallization: a new growth mechanism for t-selenium Nanotubes.
Xi G, et al.
Crystal Growth & Design, 6(2), 577-582 (2006)
Multifunctional bismuth selenide nanocomposites for antitumor thermo-chemotherapy and imaging.
Li Z, et al.
ACS Nano, 10(1), 984-997 (2015)

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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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