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211176

Sigma-Aldrich

Selenous acid

98%

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Synonym(s):
Selenious acid
Linear Formula:
H2SeO3
CAS Number:
Molecular Weight:
128.97
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.22

Quality Level

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

Hazard Classifications

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

Storage Class Code

6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

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

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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)
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
Y Kayanoki et al.
Journal of biochemistry, 119(4), 817-822 (1996-04-01)
Selenium-dependent glutathione peroxidase (GPx) plays a protective role in oxidative stress-induced apoptosis. In this study, we demonstrated that MDBK cells, a bovine renal epithelial cell line, exhibited internucleosomal DNA fragmentation characteristic of apoptotic cell death under selenium-deficient conditions with lower
H Chen et al.
International journal of food microbiology, 18(2), 151-159 (1993-04-01)
Five Salmonella serotypes recovering from heat injury exhibited different kinetics of resuscitation and growth. Exponential growth was reached before full resuscitation. Fully resuscitated cells and uninjured cells at low cell densities exhibited sensitivity when transferred from non-selective media to selective

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