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211176

Sigma-Aldrich

Selenous acid

98%

Synonym(s):

Selenious acid

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About This Item

Linear Formula:
H2SeO3
CAS Number:
7783-00-8
Molecular Weight:
128.97
EC Number:
231-974-7
MDL number:
MFCD00011331
UNSPSC Code:
12352301
PubChem Substance ID:
24852658
NACRES:
NA.22

Quality Level

200

Assay

98%

form

solid

mp

70 °C (dec.) (lit.)

density

3.004 g/mL at 25 °C (lit.)

SMILES string

O[Se](O)=O

InChI

1S/H2O3Se/c1-4(2)3/h(H2,1,2,3)

InChI key

MCAHWIHFGHIESP-UHFFFAOYSA-N

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Application

Selenous acid can be used as a reagent to synthesize:
  • α-Ketoacectals by reacting with acetophenones and triethylorthoformate in the presence of boron trifluoride etherate as a catalyst.
  • 4-Formyl-7-methylcoumarin using 4,7-dimethylcoumarin in the presence of xylene as a solvent.
  • Selenium substituted quinoxaline derivatives from 2,3-dichloro quionoxaline.

Signal Word

Danger

Hazard Statements

H301 + H331,H373,H410

Hazard Classifications

Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - STOT RE 2

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Information

危险化学品

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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D Seidel et al.
Journal of clinical chemistry and clinical biochemistry. Zeitschrift fur klinische Chemie und klinische Biochemie, 16(7), 407-411 (1978-07-01)
A simple one-vial-method was developed for the quantitative determination of sphingomyelinase activity in human leukocytes and urine, using [14C-methyl] sphingomyelin. The measured activities of healthy control persons show a higher scatter in (n=50) urine (1.2 +/- 0.5 nmol/h . ml
One-pot synthesis of alpha-ketoacetals from aryl methyl ketones in the presence of selenous acid catalyzed by boron trifluoride etherate
Kharkongor I, et al.
Tetrahedron Letters, 56, 4359-4362 (2015)
The synthesis of novel coumarin dyes and the study of their photoreaction properties
Wang T, et al.
Dyes and Pigments, 75, 104-110 (2007)
Ropp RC et al.
Encyclopedia of the Alkaline Earth Compounds null
Thomas G Back et al.
The Journal of organic chemistry, 70(23), 9230-9236 (2005-11-05)
[Reaction: see text]. Several novel organoselenium and tellurium compounds were prepared and evaluated as mimetics of the selenoenzyme glutathione peroxidase, which protects cells from oxidative stress by reducing harmful peroxides with the thiol glutathione. The compounds were tested for catalytic
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