Sulfur dioxide

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Sulfur dioxide
Identifiers
CAS number 7446-09-5 YesY
PubChem 1119
ChemSpider 1087 YesY
UNII 0UZA3422Q4 YesY
EC nummer 231-195-2
UN nummer 1079, 2037
KEGG D05961 YesY
MeSH Sulfur+dioxide
ChEBI CHEBI:18422 YesY
ChEMBL CHEMBL1235997 N
RTECS nummer WS4550000
Beilstein Reference 3535237
Gmelin Reference 1443
Jmol-3D images Image 1
Properties
Molecular formula SO
2
Molar mass 64.066 g mol−1
Appearance Colorless gas
Odor Just-struck match/eggs lik
Density 2.6288 kg m−3
Meltin pynt

-72 °C, 201 K, -98 °F

Boilin pynt

−10 °C, 263 K, 14 °F

Solubility in water 94 g dm−3[1]
Vapor pressure 237.2 kPa
Acidity (pKa) 1.81
Basicity (pKb) 12.19
Viscosity 0.403 cP (at 0 °C)
Structure
Space group C2v
Coordination
geometry
Digonal
Molecular shape Dihedral
Dipole moment 1.62 D
Thermochemistry
Std enthalpy o
formation
ΔfHo298
-296.81 kJ mol−1
Staundart molar
entropy
So298
248.223 J K−1 mol−1
Hazards
EU Index 016-011-00-9
EU classification Toxic T
R-phrases R23, R34, R50
S-phrases (S1/2), S9, S26, S36/37/39, S45
NFPA 704
NFPA 704.svg
0
3
0
LD50 3000 ppm (30 min inhaled, moose)
Related compounds
Relatit sulfur oxides Sulfur monoxide
Sulfur trioxide
Relatit compoonds Ozone

Selenium dioxide
Sulfurous acid
Tellurium dioxide

 N (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Sulfur dioxide (an aa sulphur dioxide) is the chemical compoond wi the formula SO
2
. At staundart atmosphere it is a toxic gas wi a pungent, irritatin an rotten smell. The triple pynt is 197.69 K an 1.67Kpa. It is released naiturally bi volcanic activity an is a potent global wairmin gas.

References[eedit | eedit soorce]

  1. Lide, David R., ed. (2006). CRC Handbook of Chemistry and Physics (87th ed.). Boca Raton, FL: CRC Press. ISBN 0-8493-0487-3.