71950

Sigma-Aldrich

Sodium selenite

anhydrous, ≥90.0% (RT)

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

Quality Level

assay

≥90.0% (RT)

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 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.

Packaging

100, 500 g in poly bottle

Pictograms

Skull and crossbonesEnvironment

Signal Word

Danger

hazcat

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

Supp Hazards

EUH031

storage_class_code

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

WGK Germany

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Certificate of Analysis

Certificate of Origin

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)
Selenium-catalysed debromination of vic-dibromides to alkenes with cysteine or glutathione
Yanada, Kazuo and Yanada, Reiko and Meguri, Haruo
Journal of the Chemical Society. Chemical Communications, 2008(10), 730-732 (1990)
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)
Articles
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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