Selenic acid

August 16th, 2008 by

Selenic acid

IUPAC name
Selenic(VI) acid
Other names
Selenic acid
Identifiers
CAS number
RTECS number
VS6575000
SMILES
 
OSe(O)(=O)O
Properties
Molecular formula
H2SeO4
Molar mass
144.9734 g/mol
Appearance
Colorless deliquescent crystals
Density
2.95 g/cm3, solid
Melting point
58 °C (331 K)
Boiling point
260 °C (533 K) (decomposes)
Solubility in water
130 g/100 mL (30 °C)
Acidity (pKa)
similar to H2SO4
Refractive index (nD)
1.5174 (D-line, 20 °C)
Structure
Molecular shape
tetrahedral at Se
Hazards
Main hazards
Corrosive, highly toxic
NFPA 704

0
3
2
 
R-phrases
23/25-33-50/53
S-phrases
20/21-28-45-60-61
Related compounds
Other anions
selenate
Other cations
selenyl ion, SeO22+
Related compounds
Sulfuric acid
Selenium dioxide
Except where noted [...]

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