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Sulphur dioxide

General
Systematic name
Other names sulfur(IV) oxide; sulfurous anhydride
Molecular formula SO2
SMILES S(=O)=O
Molar mass 64,06 g/mol
Appearance colourless gas, pungent odour
CAS number 7446-09-5
Properties
Density and phase
Solubility in water 112,7 g/l (water, 20°C)
Melting point -75.5°C
Boiling point -10.0°C
Acidity (pKa)
Basicity (pKb)
Chiral rotation [α]D
Viscosity
Structure
Molecular shape ?
Coordination
geometry
?
Crystal structure ?
Dipole moment ? D
Hazards
MSDS External MSDS
Main hazards ?
NFPA 704
Flash point
R/S statement R: 23, 34
S: 1/2, 9, 26, 36/37/39, 45
RTECS number
Supplementary data page
Structure and
properties
n, εr, etc.
Thermodynamic
data
Phase behaviour
Solid, liquid, gas
Spectral data UV, IR, NMR, MS
Related compounds
Other anions
Other cations
Related ? ?
Related compounds
Except where noted otherwise, data are given for
materials in their standard state (at 25 °C, 100 kPa)
Infobox disclaimer and references

Sulfur dioxide (also sulphur dioxide) is the chemical compound with the formula SO2. SO2 is produced by volcanoes and in various industrial processes. It is also used to protect wine fron dioxygen and bacteria.

Category:Chemical compounds